MP 3 Midterm Review

Molecular polarity is:

• a measure of how evenly electric charge is distributed across a molecule

• the number of protons in a molecule

• the total mass of a molecule

• the shape of a molecule

How does molecular polarity affect the behavior of water droplets on a leaf?

• Molecular polarity causes water droplets to spread evenly on a leaf.

• Molecular polarity causes water droplets to form beads on a leaf.

• Molecular polarity has no effect on water droplets on a leaf.

• Molecular polarity causes water droplets to evaporate quickly from a leaf.

Explain how molecular polarity allows an insect to walk on water.

• Molecular polarity creates surface tension, allowing water striders to walk on water.

• Molecular polarity decreases surface tension, allowing water striders to walk on water.

• Molecular polarity has no effect on surface tension, allowing water striders to walk on water.

• Molecular polarity increases the density of water, allowing water striders to walk on water.

What is the charge of an electron?

• positive

• negative

• neutral

Where is the neutron located in an atom?

• Nucleus

• Electron cloud

• Outer shell

• Valence band

Which subatomic particle is positively charged?

• proton

• neutron

• electron

What type of bond involves the sharing of electrons?

• covalent

• ionic

• codependent

• ironic

Fill in the blank: Cl₂ is an example of a(n) _______.

• Element

• Compound

• Mixture

What type of covalent bond is represented by H-H?

• single

• double

• triple

What type of bond is represented by O=O?

• single covalent

• double covalent

• triple covalent