Question

Rank the following elements that make up the majority of Earth’s crust according to increasing ionization energy Mg Ca Si O

Answer 1

Answer:

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Answer 2

The order of increasing ionization energy of the elements are; Ca < Mg < Si < O.

Ionization energy is a periodic trend that decreases down the group but increases across the period.

Ionization energy decreases down the group due to addition of more shells and increased screening of outermost electrons by the inner electrons.

Ionization energy increases across the period due to increase in size of the nuclear charge.

Hence, the order of increasing ionization energy of the elements are; Ca < Mg < Si < O.

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