Week 2 1.15 Vocab Flashcard

Front

Definition of a Physical Change?

Back

A change in a substance that does not change its identity.

Front

Definition of an Element?

Back

A substance that cannot be broken down into another substance by chemical or physical means.

Front

Definition of an Atom?

Back

Smallest particle of an element; made of electrons, protons, and neutrons.

Front

Definition of Molecule?

Back

A combination of two or more atoms held together by chemical bonds.

Front

Definition of Compound

Back

A substance made of two or more elements chemically combined.

Front

Definition of Chemical Change

Back

A change where substances combine or break apart to form a new substance.

Front

Definition of a Proton

Back

Positively charged subatomic particle in the nucleus.

Front

Definition of an Electron

Back

Negatively charged subatomic particle found outside the nucleus of an atom.

Front

Definition of a Neutron:

Back

Neutral subatomic particle in the nucleus.

Front

Definition of an atom's nucleus?

Back

"Center" of the atom made of protons and neutrons; positively charged.