24-25 The Atom Flashcards

Front

Origin of the word 'atom'

Back

Ancient Greek.

Front

Dalton's theory about atoms

Back

atoms are uncuttable.

Front

Definition of an element

Back

a pure form of matter.

Front

Three subatomic particles of atoms

Back

protons, neutrons, and electrons.

Front

Charge of a neutron

Back

A neutron has a neutral (0) charge.

Front

atomic mass unit (amu)

Back

used to measure the mass of subatomic particles.

Front

Equal number of protons and electrons in an atom

Back

a neutral atom

Front

The area where electrons are likely to be found

Back

Electron cloud/orbiting the electron

Front

One or two letters on the periodic table

Back

The chemical symbol of the element

Front

Mass number

Back

The total number of protons and neutrons in an atom