The valency of argon is
Zero
One
Two
Three
Electron was identified by
Goldstein
J.J Thomson
Chadwick
John Dalton
Which of the following represents the correct electronic configuration of silicon.
2,8
2,8,1
2,4,8
2,8,4
The charge of an electron is
+1
-1
+2
0
The orbits or shells are also known as
Energy levels
Orbitals
Ways
Paths
Which of the following represents the correct electronic configuration.
2,8,9
2,8,8
2,8,10
2,8,11
The valencies of phosphorous are
1,2
2,4
2,5
3,5
The cathode rays was discovered by
Which one of the following is a correct electronic configuration of sodium.
8,2,1
2,1,8
The sum of the masses of protons and neutrons present in the nucleus is
Mass
Charge
Density
Valency
