AP Chemistry Vocabulary

__________ are subatomic particles that are found in the space surrounding the nucleus and have a negative charge.

• protons

• neutrons

• electrons

• nucleus

The ___________ is the dense body at the very center of an atom composed of protons and neutrons.

• nucleus

• electron cloud

• valence electron

• atomic number

The ___________ is the region of the atom where electrons can be found.

• nucleus

• electron cloud

• atomic number

• proton

The ___________ of an atom is a unique number that describes how many protons an element has.

• atomic number

• valence electron

• nucleus

• electron cloud

A __________ is an electron in the outermost energy level of an atom.

• valence electron

• proton

• neutron

• nucleus

Protons have a __________ charge and are found in the nucleus.

• positive

• negative

• neutral

Electrons have a __________ charge and are found in the electron cloud.

• positive

• negative

• neutral

Tags

NGSS.MS-PS2-3

Protons have a positive charge and are found in the _________.

• nucleus

• electron cloud

Electrons have a negative charge and are found in the _________.

• nucleus

• electron cloud

The number of protons and neutrons in the nucleus make up an atom's ___________.

• mass number

• atomic number

• electron cloud

• valence electrons