There are 92 protons and 143 neutrons in the nucleus of a radioactive atom. If an α-particle is emitted from that atom how many protons and neutrons will be present in the nucleus of the new atom formed? What type of nuclear reaction is the source of energy of stars? [2 + 1]
WBBSE
Class X
Physical Science
Atomic Nucleus
03 Mark
2023
After the emission of an α-particle:
- Protons: 92 – 2 = 90
- Neutrons: 143 – 2 = 141
The new atom will have 90 protons and 141 neutrons.
The energy of stars is primarily produced by nuclear fusion reactions.
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