Question

what are the drawbacks of Thomson's atomic model ?

Answer 1

The only advantage is that it is a very simple visual model of an atomproposed by J. J. Thompson in the early 1900's. His model of the atomconsisted of a large cloud of positive matter with imbedded negative particles making the overall mass neutral. The main disadvantage is that it is wrong.

Answer 2

Answer:

Let ax + b be subtracted from p(x)=x  

3

−6x  

2

−15x+80

so that it is exactly divisible by x  

2

+x−12.

∴s(x)=x  

3

−6x  

2

−15x+80−(ax+b)

=x  

3

−6x  

2

−(15+a)x+(80−b)

Dividend = Divisor × quotient + remainder

But remainder will be zero.

∴ Dividend = Divisor × quotient

⇒s(x)=(x  

2

+x−12)×quotient

⇒s(x)=x  

3

−6x  

2

−(15+a)x+(80−b)

Hence, x(4−a)+(−4−b)=0,x



=0

⇒4−a=0 & (−4−b)=0

⇒a=4 and b=−4

Hence, if in p(x) we subtract 4x - 4 then it is exactly divisible by x  

2

+x−12