# How do find the number of electrons, protons, and neutrons given a specific element?

Jul 28, 2017

Got a Periodic Table.........

#### Explanation:

The Periodic Table, which will made available to you in every test of physics and chemistry you ever sit, tells you EXPLICITLY the number of protons, electrons, and (to a first approx.) neutrons, in all the known elements.

For hydrogen, $\text{Z, the atomic number=1}$, for sulfur, $Z = 16$, and for oxygen, $Z = 8$. By definition, $Z$ represents the number of nuclear protons, and thus specifies the ability of the element. And thus for one formula unit of ${H}_{2} S {O}_{4}$, the number of $\text{nucular protons}$ $=$ $16 + 4 \times 8 + 2 = 50$. Because these represent fundamental positive charges, you should be able to tell me how many electrons there are in the NEUTRAL molecule $\text{pdq}$.

The number of neutrons is a bit more problematic inasmuch as a given element can several isotopic forms. For sulfur, oxygen, and hydrogen we choose the COMMON isotopes, ""^1H, ""^16O, and ""^32S, which have $0 , 8 ,$ and $16$ neutrons respectively (the neutrons and the protons together represent the atomic mass). So you do the sum.

ARE you happy with this?