Question

Which molecule contains the fewest number of atoms? (2 points)

Answer 1

The answer is SmCl3 I got that answer from how many years I been studying

Answer 2

Answer: The correct option is, (a) $SmCl_3$

Explanation:

(a) $SmCl_3$

In this molecule, there are one number of samarium atom and three number of chlorine atoms. Hence, the total number of atoms present in $SmCl_3$ are, four.

(b) $RbNO_3$

In this molecule, there are one number of rubidium atom, one number of nitrogen atom and three number of oxygen atoms. Hence, the total number of atoms present in $RbNO_3$ are, five.

(c) $H_2SeO_3$

In this molecule, there are one number of selenium atom, two number of hydrogen atoms and three number of oxygen atoms. Hence, the total number of atoms present in $H_2SeO_3$ are, six.

(d) $SiH_4$

In this molecule, there are one number of silicon atom and four number of hydrogen atoms. Hence, the total number of atoms present in $SiH_4$ are, five.

From the above we conclude that, $SmCl_3$ molecule contains the fewest number of atoms that is four than the other molecules.

Hence, the correct option is, (a) $SmCl_3$