Chapter 4 Flashcards
(18 cards)
1
Q
John Dalton
A
billiard ball
atomic theory
2
Q
Thomson
A
plum pudding
light experiment
electrons
3
Q
Rutherford
A
gold foil
nucleus
4
Q
Bohr
A
flame experiment
energy levels
planetary model
5
Q
Democritus
A
atomus
6
Q
Levosea
A
conservation of mass
7
Q
amu
A
100
8
Q
alpha
A
helium
positive
paper, skin, clothing
9
Q
beta
A
electron
metal
negative
10
Q
gamma
A
no charge or mass
lead
pure energy
11
Q
cation
A
positive ion
12
Q
anion
A
negative ion
13
Q
outer electrons
A
valence
14
Q
alpha decay
A
A A-4 4
X = Y + alpha
Z Z-2 2
helium and new element
15
Q
lewis structure
A
15
4 • 2
8 • 6
73
16
Q
mass number
A
total number of protons and neutrons
17
Q
atomic number
A
number of protons
determines element
18
Q
element symbol
A
atomic mass
X
atomic #
