Terms to Learn #4 ATOMS

Front

What is the smallest unit of matter?

Back

An atom is the smallest unit of matter, made of electrons, neutrons, and protons.

Front

What is a pure substance made of only one kind of atom called?

Back

An element is a pure substance that consists of only one type of atom.

Front

What is the positively charged particle in the nucleus of an atom?

Back

A proton is the positively charged particle found in the nucleus of an atom.

Front

What is the negatively charged particle that orbits the nucleus of an atom?

Back

An electron is the negatively charged particle that orbits the nucleus of an atom.

Front

What is the particle in the nucleus of an atom with no charge?

Back

A neutron is the particle in the nucleus of an atom that has no charge.

Front

What is the center of an atom called?

Back

The nucleus is the center of an atom, containing protons and neutrons.

Front

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

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What do you call a substance made of two or more different types of atoms?

Back

A compound is a substance made of two or more different types of atoms chemically bonded together.

Front

What is the term for the arrangement of electrons around the nucleus?

Back

The electron configuration describes the arrangement of electrons in an atom.

Front

What is the term for atoms of the same element with different numbers of neutrons?

Back

Isotopes are atoms of the same element that have different numbers of neutrons.