An atom is composed of
Protons, electrons and neutrons
Protons, neutrons
Neutrons, electrons
Protons, positrons
Protium, deuterium and tritium are the isotopes of
Carbon
Hydrogen
Oxygen
Chlorine
Which of the following represents the correct electronic configuration?
2,8,9
2,8,6
2,8,10
2,7,3
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
The electronic configuration of an atom is 2,8,7, the valency of that atom is
One
Seven
Two
Eight
A very small fraction of α-particles were deflected by 180°was proposed by
Goldstein
Rutherford
J.J Thomson
Chadwick
Electrons are revolving around the nucleus in a well defined paths known as
Orbits
Orbitals
Ways
Probability
The maximum number of electrons present in a shell is given by the formula
2n
2n²
2n³
2nb
The total number of protons present in the nucleus of an atom is defined as
The model of an atom to be similar to that of a Christmas pudding was proposed by
Thomson
John Dalton