Question

1. Answer the following.
a. What is the difference in the atomic models of Thomson and Rutherford?
b. What is meant by valency of an element? What is the relationship between the number of valence electron and valency?

c. What is meant by atomic mass
number? Explain how the atomic
number and mass number of carbon are 6 and 12 respectively
d. What is meant by subatomic
particle? Give brief information of three subotomie particles with reference to electrical charge, mass and location.​

Answer 1

Answer:

a. Thomson model persumes that atom is a sphere of positive charge in which negative charged particles are studded . So positive charge and mass is distributed evenly.

Rutherford’s model presumes that all the positive charge and almost all mass is concentrated in a very small space called nucleus.