Atoms, ions and isotopes Flashcards
1
Q
What is the atomic number of an element?
A
The number of protons in the nucleus
2
Q
What is the charge on an ion?
A
The number of protons minus the number of electrons
3
Q
What is an ion?
A
An atom (or group of atoms) that has gained or lost electrons so the number of electrons and protons it contains are different
4
Q
What is an isotope?
A
Atoms that have the same number of protons (so are the same element) but a different number of neutrons
5
Q
What is the mass number of an element?
A
The mass number of an element is the number of protons and neutrons in the nucleus
