Structure of Matter Exam Review

The negatively charged particles of an atom are the ______.

• electrons
• protons
• neutrons
• protons & neutrons

The positively charged particles of an atom are the ________.

• electrons
• protons
• neutrons
• protons & neutrons

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

• electrons
• neutrons
• protons
• protons and neutrons

Which two particles make up the nucleus of an atom?

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

What is at the center of every atom?

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

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

• Proton
• Neutron
• Electron
• Quark

What is the mass number?

• the number of protons
• the sum of the number of protons and the number of neutrons in the nucleus of an atom 
• the number of electrons
• the number of neutrons

What is the atomic number?

• number of protons
• number of neutrons

Oxygen’s atomic number is 8. This means that an oxygen atom must have

• 8 electrons
• 8 protons
• 8 neutrons
• a mass number of 8

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit
• Invisible
• Transformed, changed
• None of the above