Atoms Flashcards
1
Q
What is the mass of a proton
A
1 a.m.u
2
Q
What is the mass of an electron
A
~0 a.m.u
3
Q
What is the mass of a neutron
A
1 a.m.u
4
Q
4
He
2
What is the top number?
A
Mass number
5
Q
4
He
2
What is the bottom number?
A
Atomic number
6
Q
No. Protons = ???
A
No. of protons = Atomic number
7
Q
No. of Electrons = ???
A
No. of electrons = no. of protons
8
Q
Neutrons = ??? - ???
A
Neutrons = Mass no. - Atomic no.
9
Q
Mass no. = ??? + ???
A
Mass no. = neutrons + protons
10
Q
What is an isotope?
A
An isotope is a particle which has the same atomic number but different mass number than atoms of the same element
