Chemistry Yearly Review

An electron has what kind of charge?

• no charge

• positive

• negative

• +3

When an atom loses an electron, it becomes a:

• positive ion
• negative ion
• neutral ion
• neutral atom

A substance made of two or more different elements in definite proportions (Example: H₂O, CO) is called a(n):

• Molecule

• Compound

• Element

• Mixture

Which of the following is a type of Homogeneous mixture?

• Trail mix

• Sand

• Oil & water

• Orange Juice

True or False... Matter is anything that has mass and takes up space.

• True

• False

True or False... Elements are a pure form of matter.

• True

• False

Who created the periodic table?

• John Dalton

• Dmitri Mendeleev

• Isaac Newton

• Albert Einstein

Which subatomic particle has a positive charge?

• Proton

• Neutron

• Electron

• Atom

Which subatomic particle has a neutral or NO charge?

• Proton

• Neutron

• Electron

• Atom

Which of the following are considered 'subatomic particles'?

• Proton

• Neutron

• Electron

• ALL