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Question
Density of which of the following element is highest.
Density of which of the following element is highest.
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Solution
The correct option is A Pt
Platinum is the most dense among all with 21.45 g cm3.
Down the group in d-block size doesn't increase as much because of poor shielding of f-orbitals. So, volume doesn't increase much but mass increases, hence, density increases.
Across the group in d-series, density increase due to decrease in radii and increase in atomic mass.
Pt is a 5d series element. Hence, option (a) is correct.
Platinum is the most dense among all with 21.45 g cm3.
Down the group in d-block size doesn't increase as much because of poor shielding of f-orbitals. So, volume doesn't increase much but mass increases, hence, density increases.
Across the group in d-series, density increase due to decrease in radii and increase in atomic mass.
Pt is a 5d series element. Hence, option (a) is correct.
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