Chapter 2 Quiz

______ are the smallest basic unit of matter.

• molecule

• atom

• compound

• mixture

Valence electrons are found

• outermost energy level

• innermost energy level

• some where in the electron cloud

How do covalent bonds form?

• by sharing electrons between atoms

• by donating or receiving electrons

Which of the following pH values represents the greatest concentration of H+ ions?

• 3

• 6

• 9

• 1

Which solution releases H+ in solution?

• Base
• Acid
• Buffer
• Water

How many valence electrons?

• 2

• 3

• 4

• 5

How many outermost electrons does carbon have?

• 1

• 2

• 3

• 4

Molecules composed of carbon, hydrogen, and oxygen, and they include sugars and starches.

• carbohydrate
• lipids
• proteins
• nucleic acids

Molecules composed of carbon, hydrogen, and oxygen; includes fats and oils.

• lipids
• carbohydrates
• proteins
• nucleic acids

primary source of energy

• carbohydrate
• lipids
• proteins
• nucleic acids