Review Vocabulary Unit 1

Which of the following is NOT part of an atom?

• Neutron

• Protein

• Proton

• Electron

The basic unit of a chemical element

A /an ______ is a pure substance made of one type of atom all with the same number of protons

Draw and label a water molecule

Answer explanation

There should be 2 H atoms attached to an O atom, like Mickey Mouse

A molecule is...

• A single atom

• Any two or more elements joined with a PHYSICAL bond

• Any two or more elements joined with a CHEMICAL bond

• Any two or more elements not bonded, but next to each other

A molecule made of two or more different elements

Which is an example of a polar molecule?

• Oxygen (O2)
• Nitrogen (N2)
• Carbon Dioxide (CO2)
• Water (H2O)

Hydrophobic means

• Attracting water
• Afraid of water

• Neutral to water
• Absorbing water

Hydrophilic means

• Water fearing
• Water loving
• Water neutral
• Water absorbing

Polar Molecules like other Polar Molecules

• True

• False