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Question
Explain the following:
Halogens have a high electron affinity.
Solution
The atomic size of halogens is very small. The smaller the atomic size, the greater the electron affinity, because the effective attractive force between the nucleus and the valence electrons is greater in smaller atoms, and so the electrons are held firmly.
RELATED QUESTIONS
Element X is a metal with a valency 2, Y is 3 non- metal with a valency 3.
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2) If Y is a diatomic gas, write an equation for the direct combination of X and Y to form a compound.
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