Structure of th...

Anode rays are produced when

Which of the following statement is always correct?

The first model of an atom was given by

The relative atomic masses of many elements are not whole numbers because

Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order.

(i) Rutherford’s atomic model

(ii) Thomson’s atomic model

(iii) Bohr’s atomic model

In a sample of ethyl acetate, the two oxygen atoms have the same number of electrons but different number of neutrons. Which of the following is the correct reason for it?

In Rutherfod’s Gold foil experiment most of rays returns back to its path showing that

The valency of Al with atomic number 13 is