Atomic Structure Flashcards
1
Q
Dalton
A
All elements made up of small particles called atoms
2
Q
JJ Thompson
A
Plum pudding model, stated negative electrons embedded in a positive sphere.
3
Q
Rutherford
A
Model had negative electrons orbiting a positive nucleus
4
Q
Chadwick
A
Discovered the neutron
5
Q
Present day
A
Protons and neutrons in the nucleus and electrons orbit around in shells
6
Q
Atomic number
A
This is the number of protons in an atom
7
Q
Mass number
A
This is the total number of protons and neutrons in (the nucleus of) an atom
8
Q
Isotopes
A
Isotopes are atoms which have the same number of protons (so they are atoms of the same element) but they have a different number of neutrons (so they have a different mass number).
