Question

which of the following is best described by the term macroscopic?
a) water in the liquid phase boils to become a gas.
b) water is composed of two hydrogen atoms and one oxygen atom.
c) water molecules in the solid phase are tightly held together.
d) h₂o
question 10 (5 points)
which of the following is characteristic of non - metals?
a) they tend to be denser than metals.
b) theyre strong conductors of electricity.
c) theyre always solids at room temperature.

Explanation:

Macroscopic refers to something that can be seen or observed with the naked eye. Option A describes a phase change (boiling) of water which is a macroscopic phenomenon. Option B is about the composition of water at the atomic level (microscopic). Option C is about the arrangement of water molecules (microscopic). Option D is the chemical formula (microscopic).

For non - metals:

• Metals are generally denser than non - metals.
• Non - metals are poor conductors of electricity (except for some like graphite which is a form of carbon).
• Non - metals can be in different states at room temperature (e.g., oxygen is a gas, bromine is a liquid).

Answer:

A. Water in the liquid phase boils to become a gas.