1.
Discovered the electrons
2.
Theorised that there must be something indivisible that makes up all matter
3.
James Chadwick discovered what subatomic particle?
4.
The subatomic particle with a negative charge
5.
This structure within the atom was discovered through an experiment conducted by Geiger and Marsden.
6.
Niels Bohr discovered that electrons exist at _____ distances-energies from the nucleus
7.
Isotopes are atoms of the same element with different _______ numbers
8.
When an element has a different number of electrons to the number of protons it becomes an __________
9.
For each element the number of electrons on the outer shell is the same as its _________ number
10.
The periods on the periodic table are the _______
11.
All elements in Group 2 have _________ electrons on the outer shell
12.
My element is in period three, how many shells must it have?
13.
The mass of an element is dependent on the number of _______ and Neutrons
14.
The neutrons were last to be discovered because they have no _______
15.
To calculate the number of neutrons I must do Mass number - ?
16.
What number of electrons can fill the 2nd and 3rd shell of an atom?
17.
These are an unreactive group of elements that have full outer shells
18.
Which elements has the electron configuration of 2.7
19.
Phosphorous has the electron configuration of 2.8.?
20.
Which group does not readily form ions?
21.
How many outer shell electrons does Caesium have?
22.
All metal ions are _________
23.
The charge of an oxygen ion is _________ 2
24.
Which element forms a -3 ion and has 2 shells
25.
Which element always forms a +1 ion and has 3 shells
26.
Which element is in group 3, Period 3?
