Ch 2 Review

The smallest basic unit of matter is the

• molecule.
• atom.
• compound.
• cell.

Atoms in molecules share pairs of electrons when they form

• covalent bonds.

• ionic bonds.

• hydrogen bonds.

• polymers.

Atoms transfer electrons when they form

• covalent bonds.

• ionic bonds.

• hydrogen bonds.

• polymers.

The positively charged particle in the nucleus of an atom is called the

• neutron

• ion

• proton

• electron

Which pH is considered neutral?

• pH of 4

• pH of 9

• pH of 14

• pH of 7

Tomato juice has a pH of 4. Determine if it's an acid, base, or neutral. 

• acid
• base
• neutral 

Household bleach has a pH of 12. Determine if it's an acid, base, or neutral.

• acid
• base
• neutral 

Which particles are found in an atom's nucleus?

• protons, neutrons and electrons
• protons and neutrons
• protons and electrons
• electrons and neutrons

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