Which of the following is true?

A. The first ionization energy of magnesium is lower than the first ionization energy of sodium.

B. The second ionization energy of magnesium is expected to be lower than the second ionization energy of sodium.

C. The first ionization energy of magnesium is higher than the first ionization energy of barium.

D. The effective nuclear charge is greater for the valence electrons of Mg than for the valence electrons of chlorine.

Solutions

Expert Solution

B. The second ionization energy of magnesium is expected to be lower than the second ionization energy of sodium.

Na = 11 1s22s22p63s1

Na-------> Na⁺ + e^- IP1

Na⁺¹ contains 1s22s22p6 neon electron conficuration. More amount of energy is required to remove electron from Na+ becuse of it contains octet configuration.So second ionisation potential of Sodium is greater than Magnesium.

C. The first ionization energy of magnesium is higher than the first ionization energy of barium.

in a group top to bottom ionisation energy is decreases.

queen_honey_blossom answered 1 year ago

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