MCQ
The element whose a atom has mass of $10.86 \times {10^{ - 26}}$ $kg$ is
- ABoron
- BCalcium
- CSilver
- ✓Zinc
✓
Answer
Correct option: D.
Zinc
d
(d) $1$ atom has mass $ = 10.86 \times {10^{ - 26}}kg$ $ = 10.86 \times {10^{ - 23}}\,gm$
(d) $1$ atom has mass $ = 10.86 \times {10^{ - 26}}kg$ $ = 10.86 \times {10^{ - 23}}\,gm$
$6.023 \times {10^{23}}$atoms has mass =$10.86 \times {10^{ - 23}} \times 6.023 \times {10^{23}}$ = $65.40\,gm$
This is the atomic weight of $Zn.$
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