If atomic mass of Th is $$232$$ and its atomic number is $$90$$. If it forces $$4$$ β $$-particles$$ and some α$$-particles$$. The mass number of final stable element is $$208$$ and atomic number $$82$$. How many α$$-particles$$ are emitted during this process?

Question

If atomic mass of   Th  is $$232$$ and its atomic number is $$90$$. If it forces $$4$$ β $$-particles$$ and some α$$-particles$$. The mass number of final stable element is $$208$$ and atomic number $$82$$. How many α$$-particles$$ are emitted during this process?

Infinity Learn · Accepted Answer

$$90Th232$$→$$82Pb208+x$$ $$2He4+4$$ −$$1e0$$  Balancing mass no,  $$232$$ $$=208$$ $$+$$ $$4x$$ $$+$$ $$0$$ ⇒$$x=6$$ Or, Balancing atomic no, $$90=82$$ $$+$$ $$2x$$ $$-4$$ ⇒$$x=6when$$ a  beta particle is emitted by a nucleus  mass number of the nucleus remains same but its atomic number will be increased  by one , when an alpha particle is emitted  by the nucleus its mass number will be decreased by $$4$$ and atomic number will be decreased by $$2$$.

If atomic mass of Th is 232 and its atomic number is 90. If it forces 4 $β$ -particles and some $α$ -particles. The mass number of final stable element is 208 and atomic number 82. How many $α$ -particles are emitted during this process?

Remember concepts with our Masterclasses.

Ready to Test Your Skills?

free study material

If atomic mass of Th is 232 and its atomic number is 90. If it forces 4 β -particles and some α-particles. The mass number of final stable element is 208 and atomic number 82. How many α-particles are emitted during this process?

Remember concepts with our Masterclasses.

Ready to Test Your Skills?

free study material

If atomic mass of Th is 232 and its atomic number is 90. If it forces 4 $β$ -particles and some $α$ -particles. The mass number of final stable element is 208 and atomic number 82. How many $α$ -particles are emitted during this process?