The sum of the total number of protons and neutrons present in the nucleus of an atom is defined as
Valency
Atomic number
Mass number
Reactivity
Maximum number of electrons that can be accommodated in the L shell is
2
8
18
36
Neutron was discovered by
John Dalton
Chadwick
J.J Thomson
Goldstein
Maximum number of electrons that can be accommodated in the k shell is
16
The valencies of phosphorous are
1,2
2,4
2,5
3,5
Which of the following represents the wrong electronic configuration.
2,6,2
2,8,1
2,8,8
2,8,2
The atomic number and mass number of an atom is 9 and 18 respectively, the number of protons present in that atom is
9
10
By sharing, gaining or losing electrons the atom can achieve
Octet
Triplet
The combining capacity of an atom is
Mass
Nuclear charge
Density
The only one element does not contain neutron is
Chlorine
Oxygen
Hydrogen
Carbon
