Question

the particle diagram below represents a sample of matter.
which best describes the composition of the sample?
a a single element
b a single compound
c a mixture of elements
d a mixture of compounds

Explanation:

To determine the composition, we analyze the particle diagram:

• An element consists of only one type of atom. A compound consists of two or more different atoms bonded together. A mixture contains two or more different substances (elements or compounds) not bonded.
• In the diagram, there are two types of particles (small and large circles, representing different atoms) that are not bonded (separate particles), so it's a mixture of elements (since each particle type is a single element's atom). Option A is wrong (only one element type? No, two types). Option B is wrong (no bonded atoms, so not a compound). Option D is wrong (particles are single atoms, not compounds). So it's a mixture of elements (Option C).

Answer:

C. a mixture of elements