1
Q
what’s the charge of a proton
A
+1
2
Q
what’s the charge of a neutron
A
0
3
Q
what’s the charge of a electron
A
-1
4
Q
what’s the mass of a proton
A
1
5
Q
what’s the mass of a neutron
A
1
6
Q
what’s the mass of a electron
A
negligible
7
Q
what’s the radius of an atom
A
(1x10-10m)
8
Q
what are the number of protons
A
atomic number
9
Q
what are the number of electrons
A
atomic number
10
Q
what are the number of neutrons
A
mass number - atomic number
11
Q
radius of a nucleus
A
(1x10-14)
chemistry
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