Unit 2 Review

If an atom has 3 electrons, how many protons does it have?

• 1
• 2
• 4
• 3

What is at the center of every atom?

• An electron
• A compound
• A molecule
• A nucleus

The positively charged particles of an atom are the ________.

• electrons
• protons
• neutrons
• protons & neutrons

What does the nucleus of an atom contain?

• Electrons and neutrons
• Protons and neutrons
• Neutrinos and positrons
• DNA and RN

Atoms are made up of ________________

• energy

• electrons

• subatomic particles

• gasses

The subatomic particles that make up an atom.

• solid, liquid, gas

• electrons, protons, nucleus

• energy, protons, nucleus

• electrons, protons, neutrons

__________ are negatively charged particles that are in the orbitals around the nucleus.

• protons

• nucleus

• neutrons

• electrons

The properties of an ____________ depend on the number of __________ particles in the atom.

• electron .... protons

• atom ..... energy

• atom ..... subatomic

• nucleus .... neutron

A proton has a ___________ charge.

• positive

• negative

• neutral

• massive.

A neutron has _________ charge or is ________.

• negative ... neutral

• positive .... neutral

• no .... negative

• no ... neutral