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Pitufox27
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Pitufox27
Pitufox27 joined Socratic
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karma
· Barcelona
Activity
80 Answers
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@pitufox27 Pitufox27 commented Helium is not an element of the group 2 in the periodic table. Group 2 is the berilium's group. Helium is a noble has and his group is 18.
Last level structure electronic of hydrogen and helium are exceptions on the periodic table. The position of this elements it's a compromise between last level electronic structure and chemical behaviour. In the case of hydrogen the solution adopted is to include it in the alcalin Group, it is Group 1. Helium's position considered more important his chemical behaviour as a noble has and then is placed in Group 18, although his electronic structure is 1s2, more accurate for element of Group 2. on How many valence electrons does helium have? -
@pitufox27 Pitufox27 commented Hi! There is a mistake in the formula of cone's volume.
The correct formula is:
#V = 1/3 pi cdot r^2 cdot h#.
However, the final answer does not change. on How does the volume of a cone change if its radius and height are both tripled? -
@pitufox27 Pitufox27 wrote an answer to Question #b9c49 .
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@pitufox27 Pitufox27 updated the answer to How do you calculate the molarity of 0.060 moles #NaHCO_3# in 1500. mL of solution? .
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@pitufox27 Pitufox27 updated the answer to How do you calculate the molarity of 0.060 moles #NaHCO_3# in 1500. mL of solution? .
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@pitufox27 Pitufox27 commented @Stefan V. It's not a mistake... Just a lapsus. In Spain we use point to separate thousands and comma its the symbol used to indicate decimal digits. on How do you calculate the molarity of 0.060 moles #NaHCO_3# in 1500. mL of solution?
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@pitufox27 Pitufox27 wrote an answer to How atoms of hydrogen are there in the formula #C_2H_5OH#? .
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@pitufox27 Pitufox27 wrote an answer to How do you calculate the molarity of 0.060 moles #NaHCO_3# in 1500. mL of solution? .
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@pitufox27 Pitufox27 wrote an answer to How do you differentiate #f(x)=(x-3lnx)(cosx+2x)# using the product rule? .
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