The Periodic Table

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Questions

• How can the periodic table be used to predict new elements?
• How are the elements are organized in the periodic table?
• Why is the periodic table a useful tool?
• How are elements arranged in the modern periodic table?
• What were the contributions of Mendeleev to the periodic table?
• Explain how the periodic table is organized?
• How does IUPAC name elements?
• Question #fe5fc
• Question #b9496
• Question #8bc3b
• Question #82d8d
• How does the periodic table tell you the subscripts for elements in chemical formulas?
• Question #20202
• Question #23703
• Question #56109
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• Are elements with similar chemical properties more likely to be found in the same period or in the same group?
• What determines the number of elements found in each period in the periodic table?
• Where on the periodic table are most of the natural radioactive nuclides located?
• Which period is Ca (20) in?
• What do elements in the same column in the periodic name have in common?
• What is the periodic table?
• What does "periodic" mean?
• How many periods are in the periodic table?
• What is the most reactive metal on the periodic table?
• What was Henry Moseley's major contribution to the periodic table and what year was it?
• What happens to the atomic mass as you go across a period?
• What makes the periodic table periodic?
• What is the position of oxygen in the periodic table?
• How are elements classified in the periodic table?
• What does the group number mean on the periodic table of elements?
• Where are the most metallic elements on the periodic table located?
• Are there unknown elements our periodic table is missing?
• What does the periodic table tell about an element?
• Which group in the periodic table contains only nonmetals?
• What does the group number of a column in the periodic table represent?
• What periodic trends exist for ionization energy?
• Why is the periodic table organized by atomic number rather than alphabetically?
• Question #85f20
• Where are the alkali metals, the alkaline earth metals, the halogens, and the noble gases located in the periodic table?
• Why did Mendeleev not include krypton in his periodic table of 1871?
• What information is listed in an element's square in the periodic table?
• Where would you find elements with similar properties located on the periodic table?
• Who arranged the elements according to atomic mass and used the arrangement to predict the properties of missing elements?
• Question #c0a51
• How do we explain the fact that cobalt comes before nickel in the periodic table, even though cobalt has a higher atomic mass than nickel?
• Question #9e843
• Where are the most vicious alkali metals?
• What happens to the states of matter in the halogen group?
• Would you expect strontium (Sr) to be more like potassium (K) or bromine (Br)? Why?
• How are the relationships of elements in a group different from the relationships of elements in a period?
• Why did Mendeleev leave blank spaces between zinc (Zn) and arsenic (As)?
• What are the three main classes of elements in the periodic table?
• Question #dc579
• What is the atomic number of the element located in group 16 period 2 of the periodic table?
• How should the ionization energies of the alkali metals compare with the ionization energies of the adjacent Group, the alkaline earths?
• How do you find the charge or an element on the periodic table?
• On the periodic table, do elements in group 4 have a +4 charge?
• How do you predict the charge of an ion?
• How can you find the ionic charges of elements by looking at the periodic table?
• Using the periodic table, how would you predict the charges of the ions of the following elements?
• How do you know the charge of an element from the periodic table?
• Which periodic group forms +1 ; +2 and -1 ions?
• How do you find the charge of an atom?
• What are the charges of the groups of elements on the periodic table?
• In groups on the periodic table, how do you know the charges of the elements in that group?
• How can a periodic table be used to determine the charge of an ion?
• What is the net charge of the elements Ni, I and Au on the periodic table?
• How can you determine periodic table charges?
• How can you memorize periodic table charges?
• How do you read periodic table charges?
• How do the ionization energies of the alkaline earths compare with those of the adjacent alkali metals?
• Question #d3b5d
• How does the nuclear charge evolve DOWN a Group of the Periodic Table?
• How was Mendeleev's assumption that not all of the elements were known at the time of his first publication of the Periodic Table astute?
• Why was Mendeleev's inclusion of GAPS between known elements in his original Periodic Table rational and shrewd?
• Why did Mendeleev have problems arranging the elements #Te# and #I#?
• What group of elements are contained in the p-block?
• Which block of the periodic table is the largest?
• What are the s-block elements?
• How are the groups on the periodic table arranged?
• The noble gases are located in which column of the periodic table?
• The noble gases are grouped together in the periodic table. Where are the noble gases in the table?
• What family is a very reactive group of mostly nonmetals whose atoms have 7 valence electrons?
• What are shown at the bottom of the periodic table in order to keep the table a reasonable size?
• How can the mass of an atom from the periodic table be represented in respect to moles?
• The modern periodic table is arranged in order of increasing atomic what?
• On the periodic chart, the atomic mass for the element hydrogen is more than the amu for a proton. How would you explain this fact?
• What is the first element on the periodic table?
• Question #af508
• What is the element with the electron arrangement of 2,8,8?
• Question #62df8
• Why is hydrogen sometimes grouped with the alkali metals in some Periodic Tables?
• How are elements classified?
• Lanthanoid and actinoids are placed in separate rows at the bottom of the periodic table. What is the reason for this arrangement?
• What is the Law of octave?
• Why do elements in the same group have a similar reactivity?
• What is the name of group 7 elements?
• Who "modernized" the periodic table?
• What group is sodium in?
• What group is iron in?
• What group is potassium in?
• What group is oxygen in?
• What group is chlorine in?
• What family is silver in?
• What family is iron in?
• What family is helium in?
• Which element in period 2 has the smallest atomic mass?
• What are the elements in Period 2 that are metals?
• When moving across a row in the Periodic Table, what increases?
• An atom has an atomic number of 13 and mass number of 27. In which group of the periodic table can the element be found?
• What is the element in Group 17, Period 3?
• What metals are a collection of seventeen chemical elements in the periodic table, specifically the fifteen lanthanoids, plus scandium and yttrium?
• A researcher is trying to create a new super conductive wire. Which category on the periodic table should he or she look in first?
• Suppose element X is a poor conductor of electricity and breaks when hit with a hammer. Element Z is a good conductor of electricity and heat. In what area of the periodic table does each element most likely belong?
• In the modern periodic table, how are the elements arranged?
• Question #85f83
• On which side of the table are nonmetals found?
• On which side of the Periodic table are nonmetals located?
• On which side of the table are nonmetals located?
• Who developed the first periodic table?
• Question #a27c0
• Dmitri Mendeleev developed the Periodic Table as we know it. What was his assumption while arranging the elements? Why is this assumption known to be Dmitri's biggest contribution?
• In the development of the modern periodic table, what is the best way of arranging the elements in the periodic table?
• What made Mendeleev’s periodic table more widely accepted than others?
• The element with the smallest atomic radius is?
• What is the most reactive group on the periodic table?
• Why do elements in the same group have similar physical properties?
• Why did Mendeleev not include plutonium in his periodic table of 1871?
• Why is argon placed before potassium in the modern periodic table?
• Each successive element on a period table going from left to right across a period has what?
• Are there similar blanks on the modern periodic table between magnesium and aluminum?
• Mendeleev left blanks in his periodic table (indicated by small dashes). Why, for example, did he put As, the next heaviest known element after Zn, in group 5 instead of ingroup 3 or 4?
• In addition to having identified more elements, the modern periodic table also gives the atomic masses more digits. Why do you think this the case?
• Mendeleev's version of the periodic table does not have noble (inert) gases. Why do you think the noble gases were late in being discovered?
• Which group on the Periodic Table of the Elements contains elements that react with oxygen to form compounds with the general formula #X_2O#?
• What is the similarity in chemical properties of the atoms of elements in a group of the periodic table is most closely related to?
• Who is the first periodic table mostly credited to?
• How were the elements arranged in Dmitri Mendeleev's periodic table?
• Who arranged the modern periodic table? How is it arranged?
• What general trend is found in Period 3 as the elements are considered in order of increasing atomic number?
• Do elements that have many similar properties belong to the same period or group on the periodic table?
• Are elements in the same column down members of the same period or group?
• Do elements in the same row across belong to the same period or group?
• In terms of period and group, where is the element tin, Sn found?
• Question #0d56e
• What are the elements in the middle of the periodic table?
• What is the only metalloid in period 3?
• What is the metal in group 15 that is part of compounds often found in cosmetics?
• Which group has 2 total outer electrons in the highest energy level?
• What group has a full s sublevel and a full p sublevel (total of 8 valence e-) in its highest energy level (with one exception)?
• What do all the elements in a horizontal column of the periodic table have in common?
• Which number determines how the periodic table is arranged?
• In what order are the elements of the periodic table arranged?
• In what order did Mendeleev arrange the elements in the periodic table?
• What is a transition element with five d-block electrons in energy level 4?
• What do elements in a group have in common?
• Why do the members of Group 1 react by losing an electron, but the members of Group 17 react by gaining an electron?
• What is the charge for all elements in Group 1A?
• How can chemists state with certainty that no one will discover an element that would appear on the periodic table between sulfur (S) and chlorine (Cl)?
• What are rows on the periodic table are known as?
• Where are the alkali metal elements found on the periodic table?
• The elements in Group 7A are known by what name?
• How would you define ionization energy, electron affinity and electronegativity?
• Question #ba402
• More reactive the metal, lesser the melting it has. Right?
• Why are all members of the same family on the periodic table likely to react in the same way and with the same elements?
• Why are properties such as colour, state, and taste not used to arrange elements on the first periodic table?
• What happens when Group 2A elements form ions?
• What do the elements in Period 3 all contain the same number of?
• The periodic table is a classification of the elements first organized by who?
• What are the similarities and differences between the lanthanides series and the actinide series?
• How many elements make up the lanthanide series?
• In what period do the elements in the lanthanide series belong?
• In what period do the elements in the actinide series belong?
• What group in periodic table is nitrogen located?
• To which group in the periodic table does lithium belong? How many valence electrons does it have?
• What is similar between elements in the same vertical column?
• What are group of elements in the same horizontal (side to side) row called?
• What is the 23 element on the periodic table? What does 23 stand for?
• What class of elements makes up the groups on the right side of the periodic table?
• Looking at the periodic table, elements arranged horizontally increase by what?
• Why do groups among the main-group elements display similar chemical behavior?
• What is a combination of chemical symbols and numbers to represent a substance?
• In the ground state, each atom of an element has two valence electrons. This element has a lower first ionization energy than calcium. Where is this element located on the Periodic Table?
• What elements touch the staircase in the periodic table and have properties of both metals and non-metals?
• What elements are found to the left of the staircase and form ionic bonds with non-metals, give away electrons and become positive? Hydrogen is the exception.
• Who made the modern periodic table?
• What is the most important factor in determining an element's place in the periodic table?
• Where in the periodic table are the metallic elements found?
• Which alkali metal element is the most reactive?
• Where are the lanthanides and actinides placed in the periodic table? Why?
• Which group on the periodic table is the least reactive? Why?
• Which family on the periodic table is the most reactive?
• Which group of elements typically forms ions with a 2+ charge?
• How is the modern periodic table different from the table Mendeleev proposed?
• What does an elements column number tell you about the atomic structure?
• Question #af8eb
• How may we use the Periodic Table to order atomic size?
• How would you use the periodic table to identify the atomic number, atomic mass, and number of protons, neutrons, and electrons in an atom of neon (Ne)?
• Using the Periodic Table, what is another element that has similar chemical properties as nitrogen-15?
• Why are #"actinides"# and #"lanthanides"# not placed into Groups?
• Explain the purpose of staircase line. What type of elements are on either side of (along) the line?
• For the main group elements (excluding the transition elements), is it necessary memorize to memorize the type of ion each element makes or could you predict the Ion charge using a periodic table?
• If a new element were discovered and it was found to form #1^-#ions, in which group you place itin the periodic table?
• How do you find the effective nuclear charge of lanthanides?
• How were the patterns in the elements that Mendeleev recognized different from the patterns that John Newlands recognized?
• How do you determine what group number an element is in?
• What are elements in groups 3 through 12 called?
• In what periods are the lanthanides and actinides? Where are they placed in the periodic table?
• Does the reactivity of the elements in group II increase or decrease down the group? Why?
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• How many elements in Period 3 are highly reactive?
• The discovery of what element showed the usefulness of Mendeleev's periodic table?
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• Members of which group of elements lose one electron to form cations with a +1 charge?
• Chemistry A A scientist studying a new element finds that the element does not react with any known substance. The element most likely belongs in what group?
• Using the periodic table, how would you determine the number of neutrons in 16 O?
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• If an element cannot conduct electricity, where would it be located on the periodic table?
• What does the bold stair step line on the periodic table mean?
• What increases on the periodic table as you move from left to right?
• How do an element's physical and chemical proper relate to it's position on the periodic table?
• What is the period and group of this atom?
• Are inert gases in the same group of the periodic table?
• Are inert gases in the same period of the periodic table?
• Are all the physical properties identical in the vertical column of the periodic table?
• What does the last element in any period always have?
• The chemical family of elements called the noble gases are found in what column of the periodic table?
• How are elements arranged on the Periodic Table?
• Which alkaline Earth metal is found in chlorophyll and enables plants to food?
• What is the family of elements that contains the most reactive metals?
• What family on the Periodic Table of Elements has a full outer electron shell?
• How is the name for Group 14 on there periodic table derived?
• The modern periodic table lists all the elements in order of what?
• What happens when atoms from group IA combine with atoms from group VII?
• Question #df754
• What does the zigzag line (the staircase) separate on the periodic table?
• The order of the elements in the modern periodic table is based on what aspect of the element?
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• What are the organizing principles of the Modern Periodic Table of Elements?
• As the atomic number of elements within Group 2 increases, what happens to the metallic character of each successive element?
• Question #180fb
• Question #5ed33
• Given that #"atomic numbers, Z"#, and numbers of neutrons are integral, why do we get non-integral atomic masses? What is the relationship between #Z#, and the number of electrons?
• What event helped the development of the periodic table?
• What is the group on the periodic table that has all three states of matter in it?
• What elements are member of the halogen family?
• The halogens often form salts. In which group of the Periodic Table are the halogens found?
• How would you define and explain periodic trends?
• If an element is located on the far right side of the periodic table, what would one of its physical properties probably be?
• Question #fbcdc
• Given #Z#, #"an atomic number"#, how do I know which element is referenced?
• Question #e8849
• What are #"f-elements"#?
• Please explain me iiiB group of the periodic table.?? Thank you.
• How many elements are known?
• Why IA group elements are called alkali metals and IIA group are called alkaline earth metal?? Thanks a lot .
• Why the entire d block starts with group IIIB and not IB (these are placed right after VIIIB)?
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• What is the chemical name of iron?
• If each orbital can hold a maximum of 3 electrons, the number of elements in the 4th #bb"[period of the]"# periodic table (long form) is?
• How to locate the position of element with atomic number 120 which is not yet discovered ?
• Question #944dc
• Where are the #"Noble Gases"# situated on the Periodic Table?
• How are the elements differentiated? And how many protons occur in hydrogen, helium, and lithium?
• What was Dmitri Mendeleev's major contribution to the field of chemistry?
• What is the symbol for an atom containing 20 protons and 22 neutrons?
• What accounts for the fact that there are far more substances than are listed on the periodic table?
• How can you determine the number of electrons surrounding the nucleus of an atom of any of the elements listed in the table?
• What was Henry Moseley's contribution to the development of the periodic table?
• Why do elements with similar properties appear at regular intervals in the periodic table?
• What group on the periodic table are the "Halogens"?
• Question #14342
• Question #06cac