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For which of the listed elements (E) would the energy required for the following reactions be...

For which of the listed elements (E) would the energy required for the following reactions be the least ? E(g) -->E+ (g) +e- ( I know it is K, but why, please explain) a) Ga b) Na c) Ca d) K

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Answer #1

The energy required to remove electron from outermost shell (valence electron) of an isolated gaseous atom is called ionzation energy.

Ionization energy increases from left to right across a row and decreased from top to bottom in a group of the periodic table. This is because valence electrons experience by nuclear charge increases from left to right in a row and decreases from top to bottom in a group.

Given elements, Sodium (Na) is a third row and I group element.

Potasium (K) is a third row and 1 group element.

Calcium (Ca) is a third row and 2 group element.

Gallium (GaO is a third row and 13 group element.

So, the potassium (K) has the least ionizatin energy.

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