Bio 160 Quiz 1 Review

Oxygen has ___ electrons in its valence shell.

• 1

• 2

• 4

• 6

How many bonds could oxygen form with its free electrons?

• 0

• 1

• 2

• 6

What type of bond does O₂ have?

• Ionic bond

• Polar ionic bond

• Nonpolar covalent bond

• Polar covalent bond

Why is water so effective at hydrogen bonding?

• Hydrogen is more electronegative than oxygen, so it is more likely to donate its electrons to oxygen.

• Oxygen is very electronegative and strongly attracts hydrogen's electron.

• The hydrogens in water are ionically bonded to the oxygen.

• There are two hydrogens, doubling the positive charge on the water molecule.

In the given picture, what do the RED circles represent?

• Neutrons

• Protons

• Electrons

• Covalent Bonds

In the given picture, what do the BLUE circles represent?

• Neutrons

• Protons

• Electrons

• Covalent Bonds

In the given picture, what do the BLACK circles represent?

• Neutrons

• Protons

• Electrons

• Covalent Bonds

Where are neutrons located?

• Nucleus

• Orbitals

• Cytoplasm

• Membrane

Which bond includes two atoms shared electrons?

• Polar

• Non-polar

• Hydrogen

• Covalent

In relation to stability in hydrophobic molecules, what do Van der Waals reactions do?

• Lower

• Nothing

• Delete

• Raise