An atom of mass number 15 and atomic number 7 captures anα-particle a

1.	An atom of mass number 15 and atomic number 7 captures anα-particle and then emits a proton. The mass number and atomic number of the resulting atom will be respectively(a) 14 and 2(b) 15 and 3(c) 16 and 4(d) 18 and 8
Answer» The correct option is(d) 18 and 8. Explanation: According to the law of conservation of charge, we get 7 + 2 = 1 + Z; Z = 8 According to the law of conservation of mass, we get 15 + 4 = 1 + A; A = 18 Hence, the resulting atom has mass number 18 and atomic number 8.

An atom of mass number 15 and atomic number 7 captures anα-particle and then emits a proton. The mass number and atomic number of the resulting atom will be respectively(a) 14 and 2(b) 15 and 3(c) 16 and 4(d) 18 and 8

Answer»

The correct option is(d) 18 and 8.

Explanation:

According to the law of conservation of charge, we get 7 + 2 = 1 + Z; Z = 8

According to the law of conservation of mass, we get

15 + 4 = 1 + A; A = 18

Hence, the resulting atom has mass number 18 and atomic number 8.