Answer:
Electronegativity is a measure of an atom's ability to attract shared electrons to itself. On the periodic table, electronegativity generally increases as you move from left to right across a period and decreases as you move down a group.
The answer is B, the number of protons
It's is the unique thing about every element!
<span>Answer: D. They all have the same number of electrons in the electron cloud</span>
