8th Midterm Review Q1

True or False: A proton has a positive charge

• True

• False

Anything that has mass and takes up space is...

• Matter

• Volume

• Substance

• None of the above

What is a substance?

• A single kind of matter that always has a specific makeup

• An element

• A combination of different atoms that make up a molecule

• A combination of two different things that can be separated

If iron is exposed to air and water, it can rust. What kind of change is this?

• Chemical

• Physical

• Both

• Neither

Wood tends to be relatively inflexible, especially when it's been dried. What kind of property is this?

• Physical

• Chemical

• Neither

• Both

Gold does not react to oxygen or water. What kind of property is this?

• Chemical

• Physical

• Neither, there is no reaction

• Both

Which of the following is the correct chemical formula for 2 oxygen atoms

• 2O

• O2

• H2O

• OO

True or false: A molecule is one or more atoms bonded together

• True

• False

True or False: A molecule cannot be made of two of the same atoms. Then it is just an atom.

• True

• False

Substances that are made up of only one type of atom are called...

• Elements

• Substances

• Compounds

• None of the above