Grade 8 Science: Chemistry Assessment

Which of the following is a chemical property of a substance? The substance...

• conducts electricity

• reacts with hydrochloric acid

• scratches glass

• is denser than water

Which of the following is a list of physical properties?

• Density, conductivity, reaction with acid

• Flexibility, reaction with acid, color

• Temperature change when a chemical is added, color, density

• Conductivity, hardness, density

Most elements are at what phase at room temperature?

• Solid

• Liquid

• Gas

• Plasma

Which of the following is a Noble Gas?

• Hydrogen

• Carbon Dioxide

• Argon

• Oxygen

How many valence electrons do Alkali Metals have?

• One

• Two

• Three

• Four

The compound sucrose has a chemical formula C₁₂H₂₂O₁₁

How many Elements are in one molecule of sucrose?

• 3

• 12

• 22

• 45

Tags

NGSS.MS-PS1-1

The compound sucrose has a chemical formula C₁₂H₂₂O₁₁

How many Hydrogen atoms are in one molecule of sucrose?

• 3

• 12

• 22

• 45

Tags

NGSS.MS-PS1-1

Group 17 on the Periodic Table of Elements is called what?

• The Noble Gases

• Alkaline Earth Metals

• Halogens

• Metalloids

What is found in the nucleus of an atom?

• Protons and Electrons

• Protons and Neutrons

• Neutrons and Electrons

• Protons, Neutrons, and Electrons

Ice melting is an example of what type of change?

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5