Atoms, isotopes and ions Flashcards
1
Q
What is the relative mass of the proton?
A
1
2
Q
What is the relative charge of a neutron?
A
0
3
Q
Uranium-235 has 92 protons. How many neutrons does it have?
A
143
4
Q
What is an isotope?
A
A nucleus with the same number of protons but different number of neutrons
5
Q
Nitrogen-14 has 7 protons. How many neutrons does it have?
A
7
6
Q
The mass number of an element is …
A
The number of protons and neutrons
7
Q
The atomic number of an element is …
A
The number of protons
8
Q
What has an ionised atom lost or gained?
A
Electrons
9
Q
What has changed in the structure of the Cu2+ ion?
A
it has lost 2 electrons
