Question

question 16 (multiple choice worth 3 points) (05.03r lc) which molecule contains the fewest number of atoms? smcl₃ rbno₃ h₂seo₃ sih₄

Explanation:

Step1: Count atoms in SmCl₃

SmCl₃ has 1 samarium (Sm) atom and 3 chlorine (Cl) atoms, so total 1 + 3=4 atoms.

Step2: Count atoms in RbNO₃

RbNO₃ has 1 rubidium (Rb) atom, 1 nitrogen (N) atom and 3 oxygen (O) atoms, so total 1 + 1+3 = 5 atoms.

Step3: Count atoms in H₂SeO₃

H₂SeO₃ has 2 hydrogen (H) atoms, 1 selenium (Se) atom and 3 oxygen (O) atoms, so total 2+1 + 3=6 atoms.

Step4: Count atoms in SiH₄

SiH₄ has 1 silicon (Si) atom and 4 hydrogen (H) atoms, so total 1+4 = 5 atoms.

Answer:

SmCl₃