8th Grade Midterm Review

The atomic mass equals the number of...

• protons plus the number of electrons

• protons plus the number of neutrons

• protons

• neutrons

Which statement best describes an electron?

• Smaller mass than a proton and a negative charge
• Smaller mass than a proton and a positive charge
• Greater mass than a proton and a negative charge
• Greater mass than a proton and a positive charge

What particle is X?

• Proton

• Neutron

• Nucleus

• Electron

What is the basic unit of matter? (Hint: What is all matter made up of?) Cells Light Atoms Nucleus

• Cells

• Light

• Atoms

• Nucleus

Which of the following statements is NOT true about atoms?

• Electrons are negatively charged and are found in the electron cloud outside of the nucleus.

• Protons and neutrons are found in the nucleus.

• Protons have no charge.

• Neutrons are neutral in charge and are the same mass as protons.

• The number of protons is equal to the number of electrons in a neutral atom.

The atomic mass equals the number of...

• protons plus the number of electrons

• protons plus the number of neutrons

• protons

• neutrons

What happens when water is frozen?

• Only a physical change

• Only a chemical change

• Both a physical and chemical change

• Neither physical nor chemical change

Which of the following explains this picture?

• Atoms of the same type bonding to form an extended structure

• Atoms of different types bonding to form a structure

• Christmas lights

This is an example of...

• a simple molecule

• an extended structure

This is an example of...

• a simple molecule

• an extended structure