A radioactive nucleus undergoes a series of decay according to the scheme: A stackrelα longrightarrow A 1 stackrelβ longrightarrow A 2 stackrelα longrightarrow A 3 stackrelγ longrightarrow A 4 If the mass number and atomic number of A are 180 and 72 respectively, then what are these number for A 4

Question

A radioactive nucleus undergoes a series of decay according to the scheme: A stackrelα longrightarrow A 1 stackrelβ longrightarrow A 2 stackrelα longrightarrow A 3 stackrel&gamma; longrightarrow A 4 If the mass number and atomic number of A are 180 and 72 respectively, then what are these number for A 4 (A) 172 69 (B) 174 70 (C) 176 69 (D) 176 70

Tardigrade Admin · Accepted Answer

180-4-0-4-0=172 Mass number 72-2+1-2+0=69 Atomic number

Q. A radioactive nucleus undergoes a series of decay according to the scheme: $A ⟶ α A_{1} ⟶ β A_{2} ⟶ α A_{3} ⟶ γ A_{4}$ If the mass number and atomic number of $A$ are 180 and 72 respectively, then what are these number for $A_{4}$

172 & 69

174 & 70

176 & 69

176 & 70

$180 - 4 - 0 - 4 - 0 = 172$ Mass number
$72 - 2 + 1 - 2 + 0 = 69$ Atomic number

Q. A radioactive nucleus undergoes a series of decay according to the scheme: A⟶α​A1​⟶β​A2​⟶α​A3​⟶γ​A4​ If the mass number and atomic number of A are 180 and 72 respectively, then what are these number for A4​