[" Thue "72." The number of neutrons in the "],[" parent nucleus which gives "14N" on "],[" beta-emission is "]

The number of neutrons in the parent nucleus which gives ""_(7)^(14)N on beta -emission is

The number of neutrons in the parent nucleus which gives N^(14) on beta emission is ………………………… .

The number of neutrons in the parent nucleus which gives N^14 on beta -emission and the parent nucleus is

The number of neutrons in the parent nucleus which gives N^14 on beta -emission and the parent nucleus is

Find the number of neutrons in a parent nucleus X , which gaves ._(7)N^(14) after two succe3ssive beta- emission.