Unit 3: Biochemistry Marsicano Exam 23-24

Which particles are found in the nucleus of an atom?

• Protons and electrons

• Protons and neutrons

• Electrons and isotopes

• Neutrons and electrons

The space surrounding the nucleus of an atom contains:

• protons
• electrons
• neutrons
• Ions

Which particles are found in the nucleus of an atom?

• Protons and electrons

• Electrons and neutrons

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

If an atom contains 13 protons and 15 neutrons, its atomic number is:

• 1
• 13

• 12
• 23

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
• ionic
• covalent

Which bond is the weakest type of bond?

• hydrogen
• ionic
• covalent

Which type of bond is typically considered the strongest?

• hydrogen
• ionic
• covalent

Which bond shares valence electrons?

• hydrogen
• ionic
• covalent