${ }_{84}^{218} A \stackrel{\alpha}{\longrightarrow} A_1 \stackrel{\beta^{-}}{\longrightarrow} A_2 \stackrel{\gamma}{\longrightarrow} A_3 \stackrel{\alpha}{\longrightarrow} A_4 \stackrel{B^{+}}{\longrightarrow} A_5 \stackrel{\gamma}{\longrightarrow} A_6$
$A_6$ના પરમાણુ દળમાં અને પરમાણુ ક્રમાંક શું થાય?
\({ }_{83}^{214} A _3 \stackrel{\alpha}{\longrightarrow}{ }_{81}^{210} A _4 \stackrel{\beta^{+}}{\longrightarrow}{ }_{80}^{210} A _5 \stackrel{\gamma}{\longrightarrow}{ }_{80}^{210} A _6\)
$_{90}X^{200}→ _{80}Y^{168}$