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$_{19}K$ and $_{20}Ca$ are :

Two nuclei have mass number in the ratio 1:8, what is the ratio of their nuclear radii?

The radius of $_{13}Al$ is $3.6$ Fermi. Find the radius of $_{52}Te$

The energy equivalent to $1kg$ of matter in (in Joule)

The energy of the reaction

$Li_{7}+p⟶2_{2}He_{4}$

if the binding energy per nucleon in $Li_{7}$ and $He_{4}$ nuclei are $5.60MeV$ and $7.06MeV$, respectively, is :

$Li_{7}+p⟶2_{2}He_{4}$

if the binding energy per nucleon in $Li_{7}$ and $He_{4}$ nuclei are $5.60MeV$ and $7.06MeV$, respectively, is :

The half-life of $_{238}$U for $α$- decay is $4.5×10_{9}$ years. The number of disintegration per second occur in 1g of $_{238}$U is

(Avogadro's number=6.023 10$_{23}mol_{−1}$)

(Avogadro's number=6.023 10$_{23}mol_{−1}$)

How many $α$ and $β−particles$ will be emitted when $_{90}Th_{232}$ changes into $_{82}Pb_{208}$?

The average binding energies of deuterium and $α$ -particle are 1.12 MeV and 7.1MeV respectively. The energy that liberates in the reaction $_{1}H_{2}$+$_{1}H_{2}$ $→$ $_{2}He_{4}$ is MeV.