atom

The smallest particles of matter are called

• neutrons

• atoms

• electrons

• protons

What does the atomic number represent?

• how many atoms are in a group.

• how much an atom weighs.

• the number of protons in the nucleus of the atom.

particles are packed tightest in a

• solid

• liquid

• gas

• plasma

particles move fastest in a

• solid

• liquid

• gas

• slime

Which particles are contained in the nucleus of an atom?

• neutrons and electrons

• protons and neutons

• protons, neutron, and electrons

which subatomic particles have no charge (they are neutral)?

• protons

• neutrons

• electrons

What is a subatomic particle with a positive charge?

• Proton

• Neutron

• Electron

What are kinds of subatomic particles?

• Protons neutrons, and electrons

• the nucleus

• the smallest particles of matter

smallest part of an element that has all of the properties of that element.

• nucleus

• atom

• mineral

• gem

Which subatomic particles are much smaller than the others and have a negative charge?

• protons

• neutrons

• electrons