Question

how many molecules are there? a. ? 1 b. ? 2 c. ? 3 d. ? 4 e. ? 5 f. ? 6

Explanation:

Step1: Identify molecules

A molecule is a group of atoms bonded together. Here, we have two groups: one single C atom (but wait, no—wait, the C is a single atom, but the Li - N - Li - Li is a molecule (lithium nitride, maybe? Or a molecular structure). Wait, actually, the C is a single atom (not a molecule, but maybe the question considers each distinct group? Wait, no—wait, the C is a single atom (so not a molecule), and the Li - N - Li - Li is one molecule. Wait, no, maybe I misread. Wait, the diagram: one C (atom, not a molecule), and one molecule of Li₃N (since 3 Li and 1 N bonded). Wait, but the question is "how many molecules". Wait, maybe the C is a molecule? No, a single atom is not a molecule. Wait, maybe the question has two molecules: one C (as a molecule? No, carbon can be a molecule like C₆₀, but here it's a single C. Wait, maybe the diagram is showing two molecules: one C (atom, but maybe considered a molecule) and one Li₃N. Wait, no, let's count the distinct molecular structures. The C is a single atom (so 1 "molecule" if we consider single atoms as molecules, but that's not correct. Wait, maybe the question is simpler: count the number of distinct groups. The C is one group (1 molecule), and the Li - N - Li - Li is another group (1 molecule). Wait, but that would be 2. Wait, no, maybe I'm wrong. Wait, the options: B is 2. Wait, let's re - examine. The C is a single atom (so 1 molecule? No, a molecule must have at least two atoms or be a noble gas. But maybe in the context of the question, they consider each distinct cluster. So C is one cluster (1 molecule), and the Li - N - Li - Li is another cluster (1 molecule). So total 2. Wait, but maybe the C is not a molecule. Wait, maybe the question is about the number of molecules: the Li₃N is one molecule, and the C is an atom (not a molecule). But that would be 1. But the options have A:1, B:2. Wait, maybe the diagram has two molecules: one C (as a molecule, maybe atomic carbon, but that's not a molecule) and one Li₃N. Maybe the question is designed to have two molecules: the C and the Li₃N. So the answer is 2.

Step2: Confirm the count

Looking at the diagram, we have two distinct groups: one with C (1 atom) and one with Li and N (4 atoms bonded). So if we consider each group as a molecule (even if one is a single atom, maybe in the context of the question), the number of molecules is 2.

Answer:

B. 2