Which of the following cannot be emitted by radioactive substances during their decay?

(i). Sodium (Na) is oxidised as it gains oxygen and oxygen gets reduced.  (ii). Copper oxide (CuO) is reduced to copper (Cu) while hydrogen (H2) gets oxidised to water (H2O).

(b) (i) and (iii) 

your the answer  First order

your the answer First order

(d) The 'rad' the biological effect of radiation.

The correct answer is (d) photon.

The correct answer is (b) (In 2/λ) and 1/λ

γ-rays  Frequency range 1019Hz—1022Hz

Answer (A,C) solution 23290Th is converting into 21282Pb Change in mass number (A) = 20 ∴ no of α particle =20/4 = 5 Due to 5α particle, z will change by 10 unit. Since given change...

(c) As it is given that half life of given substance is 4 months. The amount of substance left after 4 months = 1/2  The amount of substance left after 8 months...