P,Q,R and S are metals in the same group in the Periodic Table but in...

WAEC 2000

P,Q,R and S are metals in the same group in the Periodic Table but in periods 3,4, 5 and 6 respectively which of them loses electrons least readily?

A. P
B. C
C. R
D. S

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Correct Answer: Option A

Explanation

Electron affinity increases across the period and decreases down the group. This is the same with electronegativity. Consequently, it is easier for elements down the group to lose electrons than the ones at the top. Therefore, metal P will loose electron least. Option A is the correct answer.

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