Answer :-
1. Based on the periodic trends for ionization energy, which element has the highest ionization energy?
Ans. C. Helium (He) ✔️
2) Nitrogen has a larger atomic radius than oxygen.
Ans. B.) False ✔️
3) Which has more metallic character, Lead (Pb) or Tin (Sn)?
Ans. Lead has more metallic character.
4.) Which element has a higher melting point chlorine (Cl) or bromine (Br)?
Ans. Bromine (Br) has a higher melting point
5) Which element is more electronegative, sulfur (S) or selenium (Se)?
Ans. Selenium (Se)
6) Why is the electronegativity value of most noble gases zero?
Ans. Because Noble gases has fully filled valance shell and thus cannot accept or donate any electron. So, electronegativity value of most noble gases is zero.
7) Arrange these atoms in order of decreasing effective nuclear charge by the valence electrons: Si, Al, Mg, S
Ans. S, Si, Al, Mg
8) Rewrite the following list in order of decreasing electron affinity fluorine (F), phosphorous (P). sulfur (S), boron (B).
Ans. F, Cl, Br, I
9) An atom with an atomic radius smaller than that of sulfur (S) is
Ans. A.) Oxygen (O) ✔️
10) A nonmetal has a smaller ionic radius compared with a metal of the same period.
Ans. A) True ✔️
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