A substance that consists of just one type of atom.

• element

• matter

• compound

A combination of two or more substances physically blended together.

• electron

• atom

• mixture

The number of protons in an atom of an element is the element's

• atomic mass

• atomic number

• element symbol

• chemical formula

One example of a physical change is

• burning paper

• baking cookies

• heating table sugar

• dissolving salt in water

One example of a chemical reaction is

• filtering

• burning wood

• boiling water

• crushing a can

Particles in an atom that are neutral and have no charge are 

• negatrons 
• electrons 
• neutrons 
• protons 

The particles that are found in the nucleus of an atom are

• neutrons and electrons
• electrons only
• protons and neutrons
• protons and electrons

Tags

NGSS.MS-PS1-1

All matter is made of what

• energy

• atoms

• electrons

• compounds

Tags

NGSS.MS-PS1-1

The positive particles of an atom are

• electrons

• positrons

• neutrons

• protons

Tags

NGSS.MS-PS1-1

The central region of an atom where its neutrons and protons are is its

• nucleus

• electron cloud

• core

• center

Tags

NGSS.MS-PS1-1