Applications of Radioactivity

The half life of a radioactive isotope is three hours. If the initial mass of the isotope were 256 g, the mass of it remaining undecayed after 18 hours would be

Give some radioisotopes used in the field of agriculture.

Give atleast two applications of radioisotopes in the field of agriculture.

What is the use of phosphorus-32 isotope?

Which radioisotope is used in agriculture?

Give the applications of radioactivity in agriculture.

The isotope is used in the treatment of thyroid disorder is:

Radioactivity is used in industry to measure the _____ of metal or plastic sheet.

The radioisotopes are used to determine the age of rocks containing _____ isotopes.

(Write element's name only)

The radioactive isotope used in the treatment of thyroid cancer is 

STATEMENT-1: Specific activity of the same radioactive substance is same for 10g radioactive substance as well as 50g radioactive substance.

STATEMENT-2: Specific activity of a radioactive substance is its activity per g.

The overall separation factor necessary to achieve a product containing $99.7\%$ by mass $U-235$ starting form natural uranium is-

$1 \mathrm{u} \left(\mathrm{amu}\right)$ is equal to :

The half life of C-14 is 5600 years. A sample of freshly cut wood from a tree contains 10 mg of C-14. The amount left in the sample after 50000 years is $(\mathrm{a}-\mathrm{x}) \mathrm{mg}$ The value of $(\mathrm{a}-\mathrm{x}) \times 100$ is

${}_{92}\mathrm{U}^{235}$ nucleus absorbs a neutron and disintegrates into ${}_{54}\mathrm{Xe}^{139} , {}_{38}\mathrm{Sr}^{94} \mathrm{and} \mathrm{x}$. What will be the product x ?

How many $\alpha -$particles will be emitted when ₉₀Th²³⁴ changes into ₈₄Po²¹⁸ ?

Calculate the age of the ore if    ${}_{92}{\text{U}}^{238}$ by successive decay changes to ${}_{82}{\text{Pb}}^{206}$, when a sample of uranium ore was analysed it was found that it contains 1g of U²³⁸ and 0.1 g of Pb²⁰⁶, considering that all the Pb²⁰⁶ had accumulated due to decay of U²³⁸   (Half-life of U²³⁸ = 4.5 × 10⁹ yrs).

Half life period of lead is equal to.

The number of neutrons accompanying the formation of ${}_{\text{54}}^{\text{139}}\text{Xe}$ and ${}_{\text{38}}^{\text{94}}\text{Sr}$ from the adsorption of a slow neutron by ${}_{\text{92}}^{\text{235}}\text{U}$ followed by nuclear reaction is.

Emission of α-particle from a radioactive species produces its.