An element X decays into element Z by two -steps process
`X to Y + He_(2)^(4)`
`Y to Z +2e` then

An element X decays into element Z by two-step process. XrarrY+""_(2)^(4)He YrarrZ+2bare then

An element A decays into element C by a two-step process : A rarr B + ._2 He^4 B rarr C + 2 e overline Then.

An element A decays into element C by a two-step process : A rarr B + ._2 He^4 B rarr C + 2 e overline Then.

Two radio active nuclei X and Y decay into stable nucleus Z X to Z + 2alpha+ beta^- Y to Z + alpha + 2 beta^+ if Z_1 and Z_2 are atomic numbers of X and Y then

Two radio active nuclei X and Y decay into stable nucleus Z X to Z + 2alpha+ beta^- Y to Z + alpha + 2 beta^+ if Z_1 and Z_2 are atomic numbers of X and Y then

A radioactive nucleus X undergoes spontaneous decay in the sequence z X to z-1 B to z-3 C to z-2 D, where Z is the atomic number of element Z. The possible decay particles in the sequence are:

An element produces X, Y & Z compounds. Equivalent masses of that element in the compound X, Y & Z are in the ratio of 1:2:3. in which of the three compounds, element exhibits its maximum valency?