atomic structure Flashcards
1
Q
what is the nucleus of an atom made up of ?
A
- neutrons
- protons
2
Q
what orbits the nucleus ?
A
- electrons
3
Q
how are the electrons arranged in an atom ?
A
- in shells
4
Q
what does the number of protons tell you ?
A
- what element it is
5
Q
what is the relative mass of protons and neutrons ?
A
- 1
6
Q
what is the relative mass of electrons
A
- 0 (very small)
