Question

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Answer 1

Answer:

D) Reverse trend of atomic size

Explanation:

Effective nuclear charge is the attractive positive charge of nuclear protons acting on valence electrons. The periodic table tendency for effective nuclear charge:

Increase across a period

Decrease down a group

Hence the reverse trend would be the Atomic mass which decrease down the period and increase down the group

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Answer 2

Answer:

d. reverse trend in atomic size