निम्न समीकरणों को पूरा कीजिये-
`""_(84)Po^(210) to ""_(82)Pb^(206)+"………."`

Find the activity of 1 g sample of ""_(84)Po^(210) . The half-life of ""_(84)Po^(210) is 138 days.

From the reaction given below, deduce the group of polonium in the periodic table (Pb belongs to group 14) ._(84)Po^(210) rarr ._(82)Pb^(206) + ._(2)He^(4)

From the reaction given below, deduce the group of polonium in the periodic table (Pb belongs to group 14) ._(84)Po^(210) rarr ._(82)Pb^(206) + ._(2)He^(4)

The number of alpha -particles emitted by ""_(84)^(218)Ra rarr ""_(82)^(206)Pb is

इनमे से कौन निम्न श्रेणी को पूरा करेगा : BDFHJ?

The total number of alpha and beta particles lost in the process of transformation of: ""_(92)^(238)U to ""_(82)^(206)Pb is :