Isotopes Flashcards
(14 cards)
1
Q
What is an isotope
A
An element with the same number of protons but different neutrons
2
Q
Who discovered electrons and when?
A
JJ Thompson in 1898
3
Q
Who made the plum pudding model
A
Thompson
4
Q
Who made the nuclear model
A
Ernst Rutherford
5
Q
What did Bohr conclude with electrons?
A
That they must orbit the nucleus at specific distances
6
Q
Who discovered neutrons in the nucleus?
A
James Chadwick
7
Q
What is the relative mass of a proton?
A
1
8
Q
What is the relative charge if a proton?
A
+1
9
Q
What is the relative mass of a neutron?
A
1
10
Q
What is the relationship be charge of a Neutron?
A
0
11
Q
What is the relative mass of an electron
A
Very smsll
12
Q
What is the relative charge if an electron
A
-1
13
Q
How do you work out the number of neutrons?
A
Mass number-atomic number
14
Q
What is a nanometer in metres?
A
1*10 to the -9
