According to the nuclear reaction $_4Be + _2He^4 \to _6C^{12} + _0n^1$,what is the mass number of the $Be$ atom?

An element ${ }_{x} A^{y}$ emits $5$ $\alpha$ and $4$ $\beta$ particles to give ${ }_{82} B^{207}$. The number of protons and neutrons in $A$ are respectively

Which of the following is a common use of a neutron in nuclear applications?

$_6C^{12}$ and $_1T^3$ are formed in nature due to the nuclear reaction of a neutron with:

Deuterons when bombarded on a nuclide produce $_{18}Ar^{38}$ and neutrons. The target is

For the fission reaction $_{92}U^{235} + _0n^1 \to _{56}Ba^{140} + _yE^x + 2_0n^1$,the values of $x$ and $y$ are: