Fusion reaction takes place at high temp.

(a)

atoms are ionised

(b)

molecules break up

(c)

nuclei break up

(d)

to overcome repulsion between nuclei

Atomic nucleus was discovered by _______

(a)

Rutherford

(b)

Newton

(c)

Einstein

(d)

Nobel

Henry Becquerel discovered ________ in 1896

(a)

nucleus

(b)

atom

(c)

isotopes

(d)

radioactivity

Elements having atomic number greater than ________ are radioactive.

(a)

48

(b)

68

(c)

88

(d)

83

૪ rays are ________ in charge.

(a)

positive

(b)

negative

(c)

neutral

(d)

none

Write the conditions necessary for nuclear fusion.

How does the repulsive force between the two deuterium atoms overcome during nuclei fusion process?

Write a note on Dosimeter?

What is the essential difference between an electron and a beta ray?

Explain the principle & structure of atom bomb.

Explain the uses of radio isotopes in medicine field?

Distinguish between Nuclear fission and nuclear fusion.

What are the precautions to be taken by people working in radiation labs?

A radon specimen emits radiation of 3.7 × 10³ GBq per second. Convert this disintegration in terms of curie. (one curie = 3.7 × 10¹⁰ disintegration per second).

In the equation ₆C¹⁴⟶ ₇N¹⁴+_-1e⁰ which decay of radioactive carbon-14 results in the new nitrogen - 14 atom.

If Gadolinium - 150 undergoes through a - decay what is the new atomic mass of the resulting element?