Chemistry Flashcards
1
Q
What is the negative charge
A
Electron
2
Q
What is neutral charge
A
Neutron
3
Q
What is positive chatge
A
Proton
4
Q
Centre of atom?
A
Nucleus
5
Q
Elements are made up of
A
1 atom
6
Q
Electron does what around the nucleus
A
Orbits
7
Q
Nucleus contains what
A
Proton + neutron
8
Q
Amu of electron
A
Almost 0
9
Q
Amu of proton
A
1
10
Q
AMu of neutron
A
1
11
Q
How to calcite atomic number
A
How many protons
12
Q
How to calculate mass number
A
Proton + neutron
13
Q
How to calculate number of neutrons
A
Mass number - atomic number
Mass number - how many protons
14
Q
Layers around the nucleus’s called
A
Electron shells or energy levels
15
Q
Last shell is called what
A
Outer shell
