Structure of the atom

What is at the center of every atom?

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

Which two particles make up the nucleus of an atom?

• Protons and Electrons
• Protons and Neutrons
• Molecules and Compounds
• Neutrons and Electrons

In an atom, what is the number of protons equal to?

• The number of electrons.
• The number of neutrons.
• The number of molecules.
• The number of nuclei.

The particles with no charge in an atom are the _______.

• electrons
• neutrons
• protons
• protons and neutrons

The positively charged particles of an atom are the ________.

• electrons
• protons
• neutrons
• protons & neutrons

The negatively charged particles of an atom are the ______.

• electrons
• protons
• neutrons
• protons & neutrons

An electron has this charge

• positive
• negative
• neutral

A neutron has this charge

• negative
• positive
• neutral

A proton has this charge

• negative
• positive
• neutral

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

• Proton
• Neutron
• Electron
• Quark