Atomic structure Flashcards
1
Q
What is the relative mass of an electron?
A
1/1800 of a proton or neutron
2
Q
Where in the atom is most of its mass?
A
Nucleus
3
Q
What makes up most of an atom?
A
Empty space
4
Q
How did Ernest Rutherford test his theory of atomic structure?
A
Firing alpha particles at gold foil
5
Q
What are alpha particles made up of?
A
2 protons and 2 neutrons
6
Q
What was wrong with previous atomic models?
A
Evenly spread mass
