What is the relative mass of the proton?
1
1/2000
0
What is the relative charge of a neutron?
-1
Uranium-235 has 92 protons. How many neutrons does it have?
92
143
235
What is an isotope?
A nucleus with the same number of protons but different number of electrons
A nucleus with the same number of protons but different number of neutrons
A nucleus with the same number of neutrons but different number of protons
Nitrogen-14 has 7 protons. How many neutrons does it have?
7
14
21
The mass number of an element is...
The total number of protons and electrons
The total number of protons and neutrons
The total number of electrons and neutrons
The atomic number of an element is …
The total number of protons
The total number of neutrons
What is the number of protons in the nucleus equal to?
Mass number
Mass number – Atomic number
Atomic number
What has an ionised atom lost or gained?
Protons
Electrons
Neutrons
Why is deuterium \(_{1}^{2}\textrm{H}\) sometimes called heavy hydrogen?
It has an extra electron
It has an extra proton
It has an extra neutron