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Question

The mass of a single atom of an element X is 2.65×1023 g. What could this element be?

A
Nitrogen
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B
Oxygen
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C
Hydrogen
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D
Phosphorous
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Solution

The correct option is B Oxygen

One atom of the element X has mass = 2.65×1023 g

Thus, 6.022×1023 atoms of element X have mass = 2.65×1023×6.022×1023=16g

The element with gram atomic mass of 16, is oxygen (O).


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