The nucleus consists of 92 protons and 144 neutrons. How many protons and neutrons will there be in the new nucleus, which is formed after the emission of two a-particles and one b-particle?
A = 92 + 114 = 206, (atomic mass)
Let’s skip two alpha particles:
A = 206 – 4 -4 = 206 – 8 = 198 (after all, we missed two alpha particles, which means we subtract 4 twice. This will now be the atomic mass),
p = 92-2-2 = 88,
Next, let’s skip the beta particle:
A = 198 (the mass will remain the same),
p = 88 + 1 = 89.
Let’s find the number of neutrons:
neutrons = A-p = 198-89 = 109. It turns out,
Answer: 89 protons and 109 neutrons
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