Atoms and compounds

What is an element?

• Two or more atoms joined together.

• One type of atoms

• Two or more different elements joined together.

• A particle with no charge found in the nucleus of an atom

What is a molecule?

• two elements bonded together

• a mixture of different substances

• smallest individual particles

• salt mixed in water

What is a compound?

• Two or more different elements bonded together.

• Two of the same elements bonded together.

• A mixture of different substances.

• Two substances stuck together with glue

What two subatomic particles are found in the nucleus?

• proton and electron

• electron and neutron

• neutron and proton

• neutron and electron

What is the proton?

• a negatively charged particle that orbits the nucleus

• a neutral particle found in the nucleus

• a positively charged particle found in the nucleus

• a neutral particle that orbits the nucleus

What is the electron?

• a negatively charged particle that orbits the nucleus

• a neutral particle found in the nucleus

• a positively charged particle found in the nucleus

• a neutral particle that orbits the nucleus

What is the chemical symbol of the element Hydrogen?

• Hy

• H

• Hydro

• Hg

Which of the following is a chemical formula?

• H₂SO₄

• Si

• Hg

• C

An atom has 4 protons.

How many electrons does it have if the atom has a -1 charge?

• 6

• 5

• 4

• 3

What is an ion?

• a charged atom

• an atom with different neutrons

• atoms with no protons

• atoms with no electrons