Chapter 3 Review: Atoms -Building Block of Matter Mod

Front

What is an atom?

Back

The basic unit of a chemical element, consisting of a nucleus surrounded by electrons.

Front

What are the three main subatomic particles?

Back

Protons, neutrons, and electrons.

Front

What charge does a proton have?

Back

Positive charge.

Front

What charge does an electron have?

Back

Negative charge.

Front

What is the nucleus of an atom?

Back

The central part of an atom, containing protons and neutrons.

Front

What is nuclear radiation?

Back

The emission of rays and particles from radioactive materials.

Front

What is alpha radiation?

Back

A type of nuclear radiation consisting of helium nuclei (2 protons and 2 neutrons).

Front

What is beta radiation?

Back

A type of nuclear radiation that involves the emission of electrons or positrons.

Front

What is gamma radiation?

Back

High-energy electromagnetic radiation emitted from a nucleus.

Front

What is the law of definite proportions?

Back

A principle stating that a chemical compound contains the same elements in the same proportions by mass, regardless of the sample size.