Biochemistry Review

The three subatomic particles are:

• Protons, neutrons, and electrons
• Neutrons, isotopes, and electrons

The space surrounding the nucleus of an atom contains:

• protons
• electrons

The nucleus contains

• Protons and neutrons
• Protons, neutrons, and electrons

Isotopes are atoms of the same element with the same number of protons and:

• A different number of neutrons
• The same number of neutrons

If an atom contains 11 protons and 12 neutrons, its atomic number is:

• 1
• 11

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 formed

What type of electron is available to form bonds?

• valence
• nucleus

Which bond is the weakest type of bond?

• hydrogen
• covalent

Which type of bond is typically considered the strongest?

• hydrogen
• covalent
• Ionic

Which bond shares valence electrons?

• hydrogen
• covalent