(a) What are isotones?
(b) `A overset(alpha) to A_(1) overset(beta) to A_(2) overset(alpha) to A_(3)`
The mass number and atomic number of A are 180 and 72 respectively. What are these numbers for `A_(3)` ?

In a alpha -decay, the sequence is given as X overset(alpha)to X_(1) overset(beta)to X_(2)overset(alpha)to X_(3) . The mass number and atomic number of X are 170 and 62 respectively. Calculate the same values for X_(3) .

A radiactive nucleus 'A' undergoes a series of decays according to the following scheme: Aoverset(alpha)rarrA_(1)overset(beta)rarrA_(2)overset(alpha)rarrA_(3)overset(y)rarrA_(4) The mass number and atomic number A are 180 and 72 respectively. What are these number for A_(4) ?

A radioactive nuclie decay as follows A overset(alpha)to A_(1)overset(beta) to A_(2) overset(alpha)to A_(3) overset(gamma)to A_(4) . If mass number and atomic number of A are 180 and 72 respectively then mass number and atomic number for A_4 will be

A radioactive nucleus undergoes a series of deacy according to the scheme. Aoverset(alpha)rarrA_(1)overset(beta^(-))rarrA_(2)overset(alpha)rarrA_(3)overset(gamma)rarrA_(4) If the mass number and atomic number of A are 180 and 172 respectively, what are these numbers for A_(4) .

A radioactive nucleus undergoes a series of decays according to the sequence : A overset(beta)rarr A_(1) overset(alpha)rarr A_(2) overset(alpha) rarr A_(3) If the mass number and atomic number of A_(3) are 172 and 69 respectively, what rate the mass number and atomic number of A ?

(i) A radioactive nucleus 'A' undergoes a series of decays as given below : A overset(alpha)rarr A_(1) overset(beta)(rarr)A_(2)overset(alpha)rarrA_(3)overset(gamma)(rarr)A_(4) . The mass number of atomic number of A_(2) are 176 and 171 respectively. Determine the mass and atomic numbers of A_(4) and A. (ii) Write the basic nuclear processes underlying beta and beta^(-) decays.

A radioactive element X disintegrates successively Xoverset(beta^(-))toX_(1)overset(alpha)toX_(2)overset(beta_(-))toX_(3)overset(alpha)toX_(4) If atomic number and atomic mass number of X are respectively, 72 and 180, then what are the corresponding values for X_(4) ?