Lesson 2 Flashcards
1
Q
Law of conservation of mass
A
Matter can’t be created or destroyed
2
Q
Law of definite proportions
A
When atoms combine they combine in whole #s
3
Q
Thompson
A
Election, cathode ray tube
4
Q
Millikan
A
Electron, oil drop
5
Q
Atoms are
A
Electrically neutral
6
Q
Rutherford
A
Nucleus, gold foil experiment
7
Q
Chadwick
A
Neutron
8
Q
Atomic number
A
Number of protons
9
Q
Mass number
A
Protons + neutrons
10
Q
Isotopes
A
of P is same, # of neutrons change
11
Q
A
X
Z
A
Nuclear symbol
