Unit 2 - 3 Review: Matter & The Atom

Which one is not a chemical change?

• a wick burning
• a nail rusting

• metal corroding
• wax melting

Which one is not a physical change?

• paper ripping
• chopping wood
• gold melting into a liquid
• a match burning

How do you find the number of neutrons an atom has?

• Protons + electrons = neutrons

• Atomic number + atomic mass = neutrons

• atomic number - Protons = neutrons

• Atomic mass - atomic number = neutrons

A pure substance that cannot be broken down into any other substance

• atom

• element

• molecule

• compound

Two or more different elements that are combined chemically

• atom

• element

• compound

• molecule

The particles move loosely around each other. It takes the shape of the container and has a definite volume.

• solid

• liquid

• gas

The particles cannot move freely, they vibrate in place. This has a definite shape and a definite volume.

• solid

• liquid

• gas

Which of the following is a Chemical Property?

• solubility

• flammability

• viscosity

• melting point

Which of the three particles has the smallest mass?

• proton

• neutron

• electron

Which particle has a positive electrical charge?

• proton

• neutron

• electron