Write the value of n, l and m for the electron with the highest energy in sodium atom (Z =11).
The electronic configuration of Na
(Z= 11) is 1s2 2s22p6 3s1
For 3s electron
n = 3; L = 0, m = 0.
Name the particles which determine the mass of an element.
What are α-particles?
What are the fundamental particles present in a neutral atom having atomic number greater than 1?
Do protons and neutrons have identical mass?
When α-particles are sent through a thin metal foil, most of them go straight through the foil. What inference do you draw from it?
What did Rutherford's experiment on scattering of particles show for the first time?
What is Plum-Pudding model of the atom?
Are neutrons present in all atoms?
Mock Test Series
