Chapter 3

Question 0

Beta Decay

Answer 0

Gives off beta particle

Question 1

Alpha Decay

Answer 1

Gives off alpha particle

Question 2

Alpha Particle

Answer 2

4

2

Question 3

Beta Particle

Answer 3

0

-1

Question 4

Rutherford

Answer 4

Discovered nucleus
Discovered that it has a positive charge
Discovered that most of the atom is empty space
Did so by means of a gold foil experiment

Question 5

Thomson

Answer 5

Cathode ray

Found the electron

Question 6

Lavoisier

Answer 6

Matter is neither created nor destroyed in chemical reactions

Question 7

Proust

Answer 7

A given compound always contains the same elements in the same proportions by mass

Question 8

Atom

Answer 8

Smallest part of an element that retains the chemical identity of that element

Question 9

Cathode

Answer 9

Negatively charged

Question 10

Anode

Answer 10

Positively charged

Question 11

Ion

Answer 11

Atoms that lose or gain electrons

Question 12

Cathode Ray Tube

Answer 12

Used by Thomson in his experiment

Question 13

Isotope

Answer 13

Atom that has the same number of protons but a different number of neutrons

Question 14

Dalton’s 4 ideas that have not been accepted as true

Answer 14

Atomic Theory of Matter

Question 15

Atomic Mass

Answer 15

Average of the masses of the existing isotopes of an element