Key concepts Flashcards
1
Q
Compound
A
At least 2 different elements
2
Q
Where reactants found (periodic table )
A
Left hand side
3
Q
Dalton 1
A
that all matter is made of atoms and that atoms cannot be split.
4
Q
Thomson 2
A
discovered electrons
5
Q
Rutherford 3
A
Discovered alpha particles, nucleus
6
Q
N. Bohr 4
A
discovered that electrons orbit (fly around) the nucleus at fixed distances.
7
Q
Chadwick
A
discovered that some particles in the nucleus have no charge at all. He called them neutrons.
8
Q
Electrons = …
A
Electrons = protons
9
Q
Atomic number is equal to
A
Number of protons
10
Q
Mass number is equal to
A
Protons + Neutrons
11
Q
A
