Question

Fill in the blanks in the following statements

 (a) Rutherford’s α-particle scattering experiment led to the discovery of the ———

 (b) Isotopes have same ———but different———.

 (c) Neon and chlorine have atomic numbers 10 and 17 respectively. Their valencies will be———and———

respectively.

 (d) The electronic configuration of silicon is ———and that of sulphur is ———.​

Answer 1

A N S W E R :

 (a) Rutherford’s α-particle scattering experiment led to the discovery of the nucleas.

b)Isotopes have the same atomic number but a different mass number.

c)Neon and chlorine have atomic numbers 10 and 17 respectively. Their valencies will be 0 and 1 respectively.

d)The electronic configuration of silicon is 2.8. 4 and that of sulphur is 2.8. 6.

Answer 2

Answer:

(a) Nucleus

(b) atomic number , mass number.

(c) 0 , 1

(d) (2,8,4) , (2,8,6)