Question

Name the following:
(a) The most electronegative element of Period 2
(b) The largest atom of Period 3

Hint:

Remember that Noble Gases (like Neon or Argon) are often excluded from general electronegativity trends because they do not readily form chemical bonds!

Answer 1

(a) The most electronegative element of Period 2:
In Period 2 (Li, Be, B, C, N, O, F, Ne), electronegativity increases from left to right.
The most electronegative element in this period is Fluorine (F).

(b) The largest atom of Period 3:
In Period 3 (Na, Mg, Al, Si, P, S, Cl, Ar), atomic size decreases from left to right due to increasing nuclear charge.
Therefore, the largest atom in this period is Sodium (Na).

Final Answers:
(a) Fluorine
(b) Sodium