Question

Which of the following properties generally decrease along a period? *

(a) Atomic radius

(b) negative electron gain enthalpy

(c) Ionisation enthalpy

(d) Electronegativity

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Answer 1

Answer:

(a) Atomic radius is correct answer

Answer 2

A) Atomic size decreases on moving along a period from left to right due to increase in effective nuclear charge.

C) Metallic character(ability to loose electron) decreases on moving along a period from left to right due to decrease in size and increase in effective nuclear charge.

D)Atomic size decreases for metal's moving cations on moving along a period from left to right as the metal's loose their outer electrons. But it increase in non-metal's forming anions as effective nuclear charge decreases.

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