What is the relative atomic mass and atomic mass of calcium?
A
40.0,40u
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B
39.90,40.078u
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C
40.078,40.078u
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D
40.078,41.0u
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Solution
The correct option is C40.078,40.078u Relative atomic mass of an element (R.A.M) =Mass of one atom of the element112th×mass of C12atom
Relative atomic mass of Ca=40.078
Atomic mass of Ca=R.A.M×1amu=40.078amu