Chem Unit 1

The _____ is the part of the atom found outside the nucleus.

• Electron

• Proton

The neutrally charged atomic particle is called the ____.

• neutron

• electron

A proton has a _____ charge.

• negative

• positive

The _____ is the sum of protons and neutrons in one atom.

• Atomic mass

• Atomic number

The number of ______ is always the same as the number of protons in a neutral atom.

• neutrons

• electrons

The ______ is equal to the number of protons in one atom.

• Atomic mass

• Atomic number

Elements and compounds are ______

• Mixtures

• Pure substances

A(n) ______ is a substance made up of only one kind of atom.

• element

• mixture

________ are tiny particles that make up everything

• Compounds

• Atoms

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Where is almost all the mass of an atom located?

• In the Nucleus

• Compound

• In the electron cloud

• Lithium