1.

Which one of the following is an exact example of article radioactive?

Answer»

`._(11)^(23)Na + ._(0)^(1)n to ._(11)^(24)Na + gamma`
`._(11)^(24)Na + ._(1)^(1)H to ._(12)^(24)Mg + ._(0)^(1)n`
`._(2)^(4)He + ._(7)^(14)N to ._(8)^(17)O + ._(1)^(1)H`
`._(8)^(17)O + ._(0)^(1)n to ._(7)^(18)O + ._(1)^(1)H`
`._(2)^(4)HE + ._(13)^(27)Al to ._(15)^(30)P + ._(0)^(1)n`
`._(15)^(30)P to ._(14)^(30)Si + ._(-1)^(0)E`
`._(238)^(89)Ac to ._(90)^(224)Th + beta`
`._(90)^(228)Th to ._(88)^(224)Ra + alpha`

Answer :c


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