The Chemistry of Life

the smallest particle of an element that can be divided and have properties of element

• atoms

• elements

• compounds

Which of the following is formed when an atom gains or losses electrons?

• Element.

• Compound.

• Molecule.

• Ion.

Atoms in molecules share pairs of electrons when they make

• Covalent bonds.

• Ionic bonds.

• Hydrogen bonds.

• Polymers.

What gives water many properties that are important to living things? Chose the answer that best applies.

• Temperature

• Hydrogen bonds

• Density

• Specific heat

Select all solutions that are acidic.

• A solution with a pH of 8.

• A solution with a pH of 6.

• A solution with a pH of 12.

• A solution with a pH of 3.

Which phrase best describes atoms?

• single celled organism

• smallest basic unit of matter

• parts of a nucleus

• positively charged particles

An ion is formed when an atoms gains or losses

• Protons.

• Neutrons.

• Bonds.

• Electrons.

Atoms connected by covalent bonds share

• Pairs of electrons.

• Ionic compounds.

• Carbon and Oxygen.

• Hydrogen ions.

Which substance in the video is the solvent?

• salt

• water

• salt and water

• none of the above

The four main types of carbon-based molecules in organisms are carbohydrates, lipids, nucleic acids, and

• starches.

• fatty acids.

• monosaccharides.

• proteins.