unit 8 test

Question 1

what is atomic number equal to

Answer 1

of protons and # of electrons

Question 2

what is atomic #

Answer 2

of periodic table

Question 3

how to find mass #

Answer 3

top number on isotope notation or add atomic # and # of neutrons

Question 4

how to find # of neutrons

Answer 4

subtract atomic # from mass #

Question 5

fission definition

Answer 5

large atom splits into smaller atom

Question 6

fusion definition

Answer 6

smaller atoms creating a large atom

Question 7

what occurs in nature? fission or fusion

Answer 7

fusion

Question 8

what is more efficent? fission or fusion

Answer 8

fusion

Question 9

coal burning energy pros

Answer 9

cheap

Question 10

coal burning energy cons

Answer 10

greenhouse gases produced

Question 11

nuclear energy pros

Answer 11

highly efficient, no greenhouse gasses produced

Question 12

nuclear energy cons

Answer 12

expensive, generates radioactive waste

Question 13

what happens to mass # when alpha decay occurs

Answer 13

parent isotope 4 AMU heavier than daughter
- mass decreases by 4

Question 14

what happens to atomic # when alpha decay occurs

Answer 14

parent isotope 2 protons more than daughter isotope
- atomic # decreases by 2

Question 15

what happens to atomic # when beta decay occurs

Answer 15

increases by 1

Question 16

what happens to mass # when beta decay occurs

Answer 16

stays the same

Question 17

alpha- penetration power and stopped by

Answer 17

-low
-sheet of paper

Question 18

beta- penetration power and stopped by

Answer 18

-medium
-metal foil or thick wood

Question 19

gamma- penetration power and stopped by

Answer 19

• high
  -limited by lead and concrete

Question 20

becquerel

Answer 20

discovered radioactivity

Question 21

thompson

Answer 21

1. discovered the electron using cathode ray tube
2. plum pudding model

Question 22

democritus

Answer 22

introduced the idea of an atom

Question 23

Aristotle

Answer 23

all matter is made of 4 elements. water, fire, air, and earth

Question 24

dalton

Answer 24

1. provided experimental evidence of atoms but was wrong about atoms being indivisible (proved Democritus theory
2. said atoms combine in small whole # ratios

Question 24

goldstien

Answer 24

discovered positive particals using anode ray

Question 25

rutherford

Answer 25

1. gold foil experiment 2. discoved three types of radiation

Question 26

curie

Answer 26

coined the term radiation

Question 27

bohr

Answer 27

said electrons traveled around the nucleus on specific paths like planets

Question 28

schrodinger

Answer 28

proposed the quantum mechanical model of the atom

Question 29

chadwick

Answer 29

discoverd the neutron

Question 30

how to calculate relative abundance

Answer 30

1. divide % abundance by 100 2. multiply by atomic mass 3. repeat 4. add all isotpes