A(n) __________ is matter that is composed of one type of atom.

• compound

• mixture

• element

• molecule

The smallest piece of an element that still retains the properties of the element is a(n) ____________.

• atom

• molecule

• compound

• plasma

The nucleus of an atom is charged.

• positively

• negatively

• variably

• none of these

Tags

NGSS.HS-PS1-8

Neutrons have __________ charge.

• positive

• negative

• variable

• no

Electrons have __________ charge.

• positive

• negative

• variable

• no

Tags

NGSS.MS-PS2-3

Protons have __________ charge.

• positive

• negative

• variable

• no

Each energy level of an atom has a maximum number of ___________ it can hold.

• neutrons

• quarks

• protons

• electrons

Dot diagrams are used to represent ____________.

• the structure of the nucleus

• atomic number

• isotopes

• valence electrons

Tags

NGSS.HS-PS1-1

Particles of matter that make up protons and neutrons are __________.

• electrons

• isotopes

• atoms

• quarks

A chemical symbol represents the __________ of an element.

• name

• structure

• reaction

• type