Question

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