ACP Unit 2 Quiz 1

What are the positively charged particles in an atom?

• Protons
• Neutrons
• Electrons

Electrons have what charge?

• Negative
• Positive
• Neutral
   (No Charge)

The nucleus of an atom is made up of...

• Protons and Neutrons
• Neutrons and Electrons
• Protons and Electrons

What is an organic compound?

• Most compounds that contain carbon.

• Compounds that do not contain carbon.

• Energy-rich organic compound made of carbon, hydrogen, and oxygen.

• Large organic molecules made of carbon, hydrogen, oxygen, nitrogen, and in some cases sulfur.

What two elements make up water?

• Helium and oxygen
• Hydrogen and oxygen
• helium and carbon
• oxygen and carbon

What word describes when water is attracted to other substances?

• cohesion
• adhesion
• capillary action
• surface tension

Attractions between the negative Oxygen atom of one water molecule and the positive Hydrogen atom of another water molecule are called

• Covalent bonds
• Ionic bonds
• Polar bonds
• Hydrogen bonds

Why does ice float?

• As water freezes, it expands and its density decreases.
• As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
• As water freezes, air becomes trapped between the hydrogen bonds of water molecules.
• As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.

Water is a universal solvent because it...

• It can be found anywhere
• It freezes when it gets cold
• floats when frozen
• Dissolves most substances

Which end of the water molecule has a slightly positive charge?

• the oxygen end
• the hydrogen end
• both ends are slightly positive
• neither end is positive