Question 270: Atoms & Nuclei

Question

A radioactive nucleus (initial mass number $$A$$ and atomic number $$Z$$ emits $$3\,\alpha $$- particles and $$2$$ positrons. The ratio of number of neutrons to that of protons in the final nucleus will be

Accepted Answer

$${}_Z^AX\mathop  	o \limits^{A - 12} {}_{Z - 8}Y + 3{}_2^4{X_e} + {}_t^0e$$
Number of protons, N
p
= Z - 8
Number of neutrons, N
n
= $$A - 12 - \left( {Z - 8} ight)$$
$$	herefore$$ Required ratio $$ = {{A - Z - 4} \over {Z - 8}}$$

Answer

$${{A - Z - 8} \over {Z - 4}}$$

Answer

$${{A - Z - 4} \over {Z - 8}}$$

Answer

$${{A - Z - 12} \over {Z - 4}}$$

Answer

$${{A - Z - 4} \over {Z - 2}}$$

Atoms & Nuclei

A radioactive nucleus (initial mass number $A and atomic number Z emits 3\,\alpha - particles and 2$ positrons. The ratio of number of neutrons to that of protons in the final nucleus will be

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