Which ion has the smallest radius? (A) O^2- (B) Na^+ (C) Mg^2+ (D) F^- Which fac

Question

Which ion has the smallest radius? (A) O^2- (B) Na^+ (C) Mg^2+ (D) F^- Which factor has the greatest effect on atomic radius as one moves from left to right across a row on the periodic table? (A) increasing electron-electron repulsion (B) increasing principal quantum number (C) increasing number of neutrons (D) increasing nuclear charge The first four ionization energies for an element are tabulated. What is the element? (A) B (B) Be (C) c (D) N What is the strongest acid? (A) H_2Se (B) H_2O (C) Hf (D)HBr What element LEAST readily reacts with water at room a metal hydroxide and hydrogen gas? (A) Cs (B) K (C) Sc (D) Sr

Explanation / Answer

Q1.

smallest radius --> those positively charged atoms, since thye lost electrons

so the smae amount of protons will attract stronger those elctrons, i.e. radius decreases

so

Mg2+ is the best option, has the lowest raito between P+/E-

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