Which list of elements shows increasing atomic size, from
smallest to largest.
o be, mg, ca, sr
o
k, ca, cr, co
o xe, kr, ai, ne
ai, si, p, s

The answer is one of two options

K, Ca, Cr, Co

or

Ai, Si, P, S

Explanation:

For one look at a periodic table

But how you get the answer is by looking at the atomic number that is how many protons and electrons are in the atom ex: Oxygen or O has a atomic number of 8 because it has EXACTLY 8 protons and EXACTLY 8 electrons.

Now the reason I put two answers is because if it has to be a perfect line with no elements in between it is the second choice

But if it doesn't it can be either or.