Unit 3: Atoms

Front

What does the law of conservation of matter state?

Back

Matter cannot be created or destroyed, only transformed.

Front

Which atom has 8 protons?

Back

Oxygen.

Front

Which atom has 80 electrons?

Back

Mercury (Hg).

Front

What is an atom composed of?

Back

Protons, neutrons, and electrons.

Front

What happens to the measurable mass of products in an open system during a chemical reaction?

Back

The measurable mass might decrease because any gas produced can escape.

Front

Define an atom.

Back

The smallest unit of an element, consisting of protons, neutrons, and electrons.

Front

What are protons?

Back

Positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutral particles found in the nucleus of an atom.

Front

What are electrons?

Back

Negatively charged particles that orbit the nucleus of an atom.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom, which determines the element.