Q43 / 180 · NEET 2020 (Phase 1) · Chemistry

The number of protons, neutrons and electrons in $_{71}^{175} Lu$ , respectively, are

A
$104, 71$ and $71$
B
$71, 71$ and $104$
C
$175, 104$ and $71$
Correct answer
D
$71, 104$ and $71$

Solution

${}_{71}^{175}{Lu}$

$protons = 71$

$neutrons = mass number - protons = 175 - 71 = 104$

$electrons = 71$

Hence, the correct answer is option: 'D'.

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