Unit 3 Terms

Question 1

Subatomic Particles

Answer 1

Any particles smaller than an atoms. (Electrons, Neutrons, Protrons.)

Question 2

Electrons

Answer 2

-1
found ouside of the nucleus in electron cloud.
Mass: 0 amu

Question 3

Protons

Answer 3

+1
Found in the nucleus
Mass: 1 amu
Atomic Mass: 1 amu

Question 4

Neutrons

Answer 4

Neutral
Found in nucleus
Mass: 1 amu

Question 5

Determinds Atomic #

Answer 5

Protons

Question 6

Determinds nuclear stabilty

Answer 6

Neutrons

Question 7

Determinds chemical properties

Answer 7

Electrons

Question 8

Isotopes

Answer 8

Diffrent forms of an element
(Same p+ , differ in n, mass, nuclear stability)

Question 9

Ions

Answer 9

An atom or group of atoms that have an unbalanced electrical charge.
(difference in e-, change in charge)

Question 10

Cation

Answer 10

Positivly charge ion

Question 11

Anion

Answer 11

Negitive charged ion

Question 12

Ńaming Anions

Answer 12

drop ending, add -ide
n-=nitroide ion

Question 13

Naming Cations

Answer 13

Name + ion
Li+= Lithium Ion

Question 14

Transition Metals

Answer 14

In box on periodic table
Cu2+=Copper (ll) ion

Question 15

Mass Number

Answer 15

p+ + n= Mass

Question 16

Average Atomic Mass

Answer 16

Weighted average of the masses of the isotopes for an element. (amu)

Question 17

What changes in a nuclear reaction?

Answer 17

The nucleus either loses/gains mass or losses energy.

Question 18

Alpha Decay

Answer 18

Mass: 4
p+=2
-When a ¨clump¨ is removed from the nucleus and becomes smaller
-moves out of nucleus
-Stopped by paper

Question 19

Beta Decay

Answer 19

Mass: 0
charge: -1
-High speed electron from nucleus leaves and creates a p+
-moves out of nucleus
-Stopped by metal foil

Question 20

Gamma Decay

Answer 20

Mass: 0
Charge: 0
NOT A PARTICLE
-p+ and n shift positions moving closer together lowering energy
-moves out nucleus
-Stopped by lead, concrete, or water

Question 21

Positron emission

Answer 21

Mass: 0
Charge: +1
-Anti-electron, different charge (+1 not -1)
-moves out of nucleus
-Electron is added to n and turns into p+

Question 22

Electron capture

Answer 22

Mass: 0
Charge:-1
-Same as Beta
-Moves IN the nucleus
-electron from electron cloud is assed to proton to create a n

Question 23

Fission

Answer 23

• (splitting) A larger nucleus breaks into 2 or more smaller parts
  KEY WORDS: Decay or Emission
  -write with element and then arrow

Question 24

Fusion

Answer 24

-(combine) A fast moving particle collides with nucleus and fuses together
KEY WORDS: Bombard and Capture
-element+nuclear reactice then arrow

Question 25

Half-Life

Answer 25

The amount of time it takes a radioactive element 1/2 decay

Question 26

Which subatomic particle is associated with element identity?

Answer 26

p+

Question 27

Which subatomic particle is responsible for isotope identity?

Answer 27

n

Question 28

Which subatomic particle is associated for ion identity?

Answer 28

e-

Question 29

Which subatomic particle is responsible for stability?

Answer 29

n and p+

Question 30

Which subatomic particle is responsible for the physical properties?

Answer 30

p+ and n