How many beta particle(s) are emitted in the radioactive decay of 198 79 A u ← 198 80 H g ?
Options
A) 1 >>>>>>>>>
B) 2
C) 3
D) 5
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NOTE – N.B
Explanation:
A beta particle forms when a neutron changes into a proton and a high-energy electron. The proton stays in the nucleus but the electron leaves the atom as a beta particle. When a nucleus emits a beta particle, these changes happen:
the mass number stays the same
the atomic number increases by 1
the nuclear charge increases by 1
NB: Usually gold is created from platinum, which has one less proton than gold, or from mercury, which has one more proton than gold. Bombarding a platinum or mercury nucleus with neutrons can knock off an neutron or add on a neutron, which through natural radioactive decay can lead to gold.
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