Why does the size of atom decreases as we go across a period?

The number of shells are added

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The nuclear charge increased

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The nuclear charge decreases

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The number of shells decrease

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Solution

The correct option is C The nuclear charge increased
On moving left to right across a period, the atomic radius decreases because the nuclear charge increases as the atomic number rises which makes the atom more compact.

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Why does the size of atom decreases as we go across a period?

The correct option is C The nuclear charge increasedOn moving left to right across a period, the atomic radius decreases because the nuclear charge increases as the atomic number rises which makes the atom more compact.

The correct option is C The nuclear charge increased
On moving left to right across a period, the atomic radius decreases because the nuclear charge increases as the atomic number rises which makes the atom more compact.