Atomic Structure and Periodic Table Flashcards
1
Q
Molecule
A
A number of atoms joined together
2
Q
Element
A
Made of one type of atom
3
Q
Compound
A
Made of two or more different atoms chemically joined together
4
Q
Mixture
A
Two or more different atoms that are not chemically joined together
5
Q
Dalton
A
Billiard ball - simple solid sphere
6
Q
Thomson
A
Plum pudding: solid sphere with positive and negative charges inside
7
Q
Rutherford
A
Nuclear atomic model - positive nucleus in the middle, mostly empty space, cloud of negative charges surrounding it
8
Q
Bohr
A
Realised that having opposite charges so close would cause the atom to collapse so he thought that there would have to be fixed orbits around the nucleus for the negative charges to be separate from the positive nucleus
