An __________ is the specific amount of energy an electron has

• proton

• electron

• scientific theory

• energy level

A small positively charged particle found in the the nucleus of an atom is called

• proton

• energy level

• nucleus

• matter

Two or more elements, compounds or substances that are mixed together, but not chemically combined are called

• compound

• mixtures

• matter

• models

Negatively charged particles that move around outside the nucleus off an atom

• compound

• element

• electron

• neutron

Tags

NGSS.MS-PS2-3

Two or more substance chemically combined in a specific ratio are called a

• compound

• mixture

• matter

• model

A physical, mental, or visual representation of an idea to help people understand what they cannot observe directly is called a

• compound

• mixture

• matter

• model

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Anything that has mass and occupies space is

• nucleus

• protons

• matter

• model

___________ are the smallest particles in an element.

• Protons

• Atoms

• Nucleus

• milk

An __________ is a substance that cannot be broken down into any other substance by chemical or physical means. (pure substance)

• nucleus

• element

• neutron

• proton

The central core of an atom which contains protons and usually neutrons is called the

• nucleus

• protons

• elements

• scientific theory