Atoms

What are two characteristics of matter?

• takes up space and is energy

• has mass and is energy

• has mass and takes up space

• doesn't take up space and is not energy

All matter is made of

• energy.

• atoms.

• electrons.

• compounds.

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

• nucleus.

• electron cloud.

• core.

• center.

A particle that moves around the nucleus is a(n)

• proton.

• neutron.

• electron.

• quark.

The positive particles of an atom are

• electrons.

• positrons.

• neutrons.

• protons.

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

• negatrons.

• electrons.

• neutrons.

• protons.

Electrons have this type of charge.

• negative

• positive

• neutral

These contain only one kind of atom. 

• element 
• compound 
• mixture 
• water 

Which statement is true about compounds?

• It is a pure substance where two or more elements are chemically combined.

• It is a homogenous mixture of 2 or more elements.

• It is a pure substance containing only one type of atom.

• It is a heterogeneous mixture of 2 or more elements chemically combined.

In a ______________, one substance is dissolved in another substance.

• solution

• mixture

• compound