Complete the following decay reactions 1. 18474Pb -> 42 He+
2. 146C -> 0.1e+
3.
-> 0
- 1e + 6028Ni
4.
-> 4 He + 2078171
5. 31H -> 0-1e+

Ibelieve the answer is d. bleachhope my answer has you : )

Anyone know the answer?

The answer to your q it is false

Firstly, the planetary model of the atom  failed  to explain why individual atoms produce discrete  line spectra. in fact, according to rutherford's model, each individual atom should produce a  continuous  line spectrum. the second flaw to his model was the fact that electrons orbit the nucleus in a circular fashion.