Question

An element X decays, first by positron emission and then two
????-particles are emitted in successive radioactive decay. If the
product nuclei has a mass number 229 and atomic number
89,the mass number and atomic number of element X are
(a) 237, 93 (b) 237, 94
(c) 221, 84 (d) 237, 92

Answer 1

Answer:

here,,

mass number:237

atomic number:92

Answer 2

Answer:

$\huge{\underline{\mathfrak{\blue{Answer..}}}}\:$

d option is correct.