Chapter 2 Misc Terms

Question 1

biochemistry

Answer 1

a field of study devoted to studying chemical aspects of life, or the chemistry of life

Question 2

matter

Answer 2

anything that occupies space and has mass

Question 3

atom

Answer 3

smallest unit of matter, used to build more complicated substances in the human body

Question 4

molecules

Answer 4

particles of matter that composed of one or more atoms

Question 5

subatomic particles

Answer 5

protons, electrons and neutrons

Question 6

nucleus

Answer 6

core of an atom composed of positively charged protons and uncharged neutrons

Question 7

atomic number

Answer 7

the number of protons in the nucleus

Question 8

atomic mass

Answer 8

the number of protons and neutrons combined in the nucleus

Question 9

orbitals

Answer 9

limits within electrons can move about, each orbital can hold 2 electrons

Question 10

energy levels

Answer 10

or shells, orbitals arrangement around the nucleus; the farther an orbital extends from the nucleus, the higher the energy level

Question 11

elements

Answer 11

pure substances, composed of only one type of atom

Question 12

compounds

Answer 12

substances whose molecules have more than one element in them