The decay constant of a radioactive sample is X.

Since average atomic mass  = 16 x X + 18 x (100 – X )/100  16.2 = 16X + 1800 – 18X/100  1620 = – 2X + 1800  2X = 1800 – 1620  X =...

(a) Let the percentage of 17X 37 is p  Percentage of 17X 35 = (100 – p)  Average atomic weight = 35.5  Therefore  35.5 = 37p + 35(100 − p) /100  3550 = 37p + 3500 − 35p  3550...

1 mole of oxygen atoms = 6.023×1023 atoms  ∴Number of moles of oxygen atoms =   2.58 ×1024 / 6.022×1023                             ...

your the answer  First order

your the answer First order

(a) Protons: Protons are not emitted during radioactive decay.

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

The correct answer is (d) photon.

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...