section 2-3

Question 1

a substance with a pH of 6 is called

Answer 1

an acid

Question 2

solutions that have more OH- than H+ ions are

Answer 2

acids

Question 3

why is carbon so special compared to other elements?

Answer 3

carbon atoms can bond to one another and form a lot of different structures

Question 4

carbon-12 is the most common isotope of carbon. it has 6 protons, 6 neutrons, and 6 electrons. of its 6 electrons, 4 are valence electrons. how many covalent bonds can a carbon atom form?

Answer 4

12

Question 5

amino acid is to protein as

Answer 5

fat is to lipid

Question 6

in chemical reactions, atoms are

Answer 6

rearranged

Question 7

when hydrogen and oxygen combine to form water, water is

Answer 7

a product

Question 8

what is not true about enzymes?

Answer 8

all enzymes have the same shape as their substances

Question 9

the elements or compounds that go into a chemical reaction are…

Answer 9

products

Question 10

the energy needed to start a chemical reaction is called the…

Answer 10

activation energy

Question 11

complex carbohydrates are to monosaccharides as polymers are to…

Answer 11

monomers