Chemistry of life

Question 1

Why do we study chemistry in Biology class?

Answer 1

All living and nonliving things are made up of chemical compounds

Question 2

Basic unit of matter:

Answer 2

atom

Question 3

atom comes from the greek word atomos meaning…

Answer 3

“unable to be cut”

Question 4

Parts of the atomm

Answer 4

proton, neutron, electron

Question 5

proton:

Answer 5

positively charged particles (pt)

Question 6

neutron:

Answer 6

neutral, no charge (n°)

Question 7

electron:

Answer 7

negatively charged particles (e-)

Question 8

These are found constantly circling the nucleus, creating what is called an…

Answer 8

“Electron Cloud”

Question 9

Element:

Answer 9

a substance that consists entirely of one type of atom

Question 10

known elemtents

Answer 10

120

Question 11

natural elements

Answer 11

90

Question 12

atomic number is equal to…

Answer 12

number if proteins and electrons

Question 13

Atomic mass

Answer 13

atomic number = number of neutrons

Question 14

Isotopes:

Answer 14

same element, but different number of neutron (different mass)

Question 15

some isotopes are _________, which means that they will break down over time. (they are unstable)

Answer 15

radioactive

Question 16

Uses of radioactive isotopes:

Answer 16

dating fossils, power, medicine