Question

question 10 10 pts
the atomic arrangements of two substances (a and b) are shown in the diagram.
substance a substance b
which statement describes one of the substances correctly ?
substance a is a compound as two different types of atoms are present.
substance b is a compound as the atoms can be separated only by chemical processes.
substance b is a mixture as the atoms can be separated by any physical process.
substance a is an element as atoms are not combined chemically.

Explanation:

1. Analyze Substance A: It has two types of atoms not chemically bonded (mixture of elements), so it's not a compound or an element (as elements have one atom type). Eliminate the first and fourth options.
2. Analyze Substance B: Molecules with two different atoms (chemically bonded), so it's a compound. Compounds' atoms are separated by chemical processes, not physical. So the second option is correct, third is wrong (B is not a mixture).

Answer:

B. Substance B is a compound as the atoms can be separated only by chemical processes.