Question

Arrange the following in order of decreasing mass
i.$ 1\, F$ atom
ii. $1 \,N$ atom
iii. $1 \,O$ atoms
iv. $1 \,H$ atom

• A. $i > iii > iv > ii$
• B. $iv < ii < iii < i$
• C. $i > iii > ii > iv$
• D. $iii > i > ii > iv$

Answer 1

Answer: (C)

Mass of $1\,F$ atom
$= \frac{19}{6.023 \times 10^{23}}$
(since At. wt. of $F = 19$)
Mass of $1\,N$ atom $= \frac{14}{6.023\times 10^{13}}$,
Mass of $1\, H$ atom $= \frac{1}{6.023\times 10^{23}}$
Mass of $1 \,O$ atom $ = \frac{16}{0.623\times 10^{23}}$
$i > iii > ii > iv$