In Class Chemistry of Life Review

The three particles that make up atoms are

• protons, neutrons, and isotopes.
• neutrons, isotopes, and electrons.
• positives, negatives, and electrons.
• protons, neutrons, and electrons.

The space surrounding the nucleus of an atom contains

• protons
• electrons
• neutrons
• ions

Which of the following terms describes a substance formed by the combination of two or more elements in definite proportions?

• compound
• isotope
• nucleus
• enzyme

Which of the following statements about a compound is true?

• The physical and chemical properties of a compound are usually very different from those of the elements from which it is formed.
• Only the physical properties of a compound are usually the same as those of the elements from which it is formed.
• Only the chemical properties of a compound are usually the same as those of the elements from which it is formed.
• The physical and chemical properties of a compound are usually the same as those of the elements from which it is formed.

A covalent bond is formed as the result of

• transferring electrons.
• sharing an electron pair.
• transferring protons.
• sharing a proton pair.

What type of ion forms when an atom loses electrons?

• neutral
• positive
• negative
• possibly positive or negative

Ice floats on water because

• of cohesion.
• ice has a higher density than water.
• water shrinks when it freezes.
• water expands when it freezes.

Water molecules are polar, with the

• oxygen side being slightly positive and the hydrogen side being slightly negative.
• oxygen and hydrogen sides being slightly positive.
• oxygen and hydrogen sides being slightly negative.
• oxygen side being slightly negative and the hydrogen side being slightly positive.

Amino acid is to protein as

• fat is to lipid.
• DNA is to RNA.
• sugar is to fat.
• monosaccharide is to carbohydrate.

A monosaccharide is a

• carbohydrate
• lipid
• nucleic acid
• protein