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Based on their positions in the periodic table, rank the following atoms or compounds in order...

Based on their positions in the periodic table, rank the following atoms or compounds in order of increasing first ionization energy: Mg, O, S, Si
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Answer #1

increasing order of ionization energy: Mg< Si < O < S

ionization energy trend:

1)along the period, with the increase of atomic number, the ionization energy increases. Due to the increase of electronegativity, we have to spend more energy to release of an electron.

2) moving down the group, with the increase of atomic number, ionization energy decreases. Due to the decrease of electronegativity, moving down the group, the I.E decreases.

so Mg being a group 2 element, its ionization energy is least among all. silicon being group 6 element, its ionization energy is more than Mg. Besides this, O and S are of the same group element, i.e. group 8 element. But S is situated below O atom having less electronegativity as compared to O atom. so S has less ionization energy as compared to S atom.

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