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In a nuclear reaction, if a nucleus emits an alpha particle, what happens to its
In a nuclear reaction, if a nucleus emits an alpha particle, what happens to its atomic number? (2023)
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Q1
In a nuclear reaction, if a nucleus emits an alpha particle, what happens to its atomic number? (2023)
It increases by 2
It decreases by 2
It remains the same
It decreases by 4
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An alpha particle consists of 2 protons and 2 neutrons, so the atomic number decreases by 2.
Questions & Step-by-step Solutions
1 item
Q
Q: In a nuclear reaction, if a nucleus emits an alpha particle, what happens to its atomic number? (2023)
Solution:
An alpha particle consists of 2 protons and 2 neutrons, so the atomic number decreases by 2.
Steps: 4
Show Steps
Step 1: Understand what an alpha particle is. An alpha particle is made up of 2 protons and 2 neutrons.
Step 2: Know that the atomic number of an element is determined by the number of protons in its nucleus.
Step 3: When a nucleus emits an alpha particle, it loses 2 protons.
Step 4: Since the atomic number decreases by the number of protons lost, the atomic number will decrease by 2.
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