Atoms Molecules Formula Units

What is an element?

• Two or more atoms joined together.

• One of over 100 types 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 (sharing electrons)

• a mixture of different substances

• smallest individual particles

• salt mixed in water

Tags

NGSS.MS-PS1-1

What is a compound?

• Two different elements bonded together.

• Two of the same elements bonded together.

• A mixture of different substances.

• Two substances stuck together with glue.

Tags

NGSS.MS-PS1-1

What two subatomic particles are found in the nucleus?

• proton and electron

• electron and neutron

• neutron and proton

• neutron and electron

Which of the following is a chemical formula?

• H₂SO₄

• Si

• Hg

• C

Tags

NGSS.MS-PS1-1

Which of the following is a chemical symbol?

• H₂O

• O

• NaCl

• FeO

What is the chemical symbol for the element mercury?

• Hg

• Merc

• MeC

• MY

What is an ion?

• a charged atom

• an atom with different neutrons

• atoms with no protons

• atoms with no electrons

Where are electrons found?

• the nucleus

• next to the neutrons

• the proton

• orbiting the nucleus

Which correctly describes the smallest amount of an element?

• Atom

• Molecule

• Compound

• Proton