Topic 1 DCA 2025

Front

What do atoms combine to form?

Back

Molecules

Front

How many total atoms are in the compound C₂H₈O?

Back

11

Front

How many Hydrogen atoms are in 4H₂O?

Back

8

Front

What is a compound?

Back

A substance in which the atoms of two or more elements are combined together.

Front

How many Nitrogen atoms are in (NH₄)₂CrO₄?

Back

2

Front

What is the smallest unit of a chemical element?

Back

Atom

Front

What is the term for a substance made of only one type of atom?

Back

Element

Front

What is the chemical formula for water?

Back

H₂O

Front

What is the process called when a substance changes from a liquid to a gas?

Back

Evaporation

Front

What is the term for the number of protons in the nucleus of an atom?

Back

Atomic number