CBSE Class 9 Answered
The mass of single atom of an element x is 2.65*10-23g. What is its atomic mass and what could this element be?Please give me the ans. step wise.
Asked by Riyali Panmand | 25 Nov, 2013, 04:10: PM
Expert Answer
The atomic mass of an element is numerically equal to the mass of 1 mole of its atoms.
1 mole of atoms = 6.022 × 1023 atoms
Now, 1 atom of element X has mass = 2.65 × 10-23g
So 6.022 × 1023 atoms of element X have mass = 2.65 × 10-23×6.022 × 1023
= 15.96 = 16g
Atomic mass of the element X is 16u.
Oxygen is the element with atomic mass 16 and having symbol O.
Answered by Vaibhav Chavan | 27 Nov, 2013, 01:12: PM
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