Generally, as you go from left to right on the periodic table, what happens to:

A) Atomic radius?

B) First ionization energy?

C) Electronegativity?

b. first ionization energy

Explanation:

Therefore, moving left to right across a period the nucleus has a greater pull on the outer electrons and the atomic radii decreases. Moving down a group in the periodic table, the number of filled electron shells increases ... Therefore, the positive nucleus pulls the electrons tighter and the radius is smaller.