Answer:
Valence electrons
Explanation:
In a period, the number of valence electrons increases (mostly for light metal/elements) as we move from left to right side
Answer:
It starts to move because of Newtons first law "An object will not change it's motion unless a force acts on it"
Explanation:
Meaning ball B is that force acting upon ball A
Br
Se
As
Ge
Ga
Rb
Elements in the top right corner of the periodic table have the highest electronegativity. Elements on the right side have a higher electronegativity than those on the left, same with the ones on the top in comparison to those on the bottom.