Answer:
option c
Explanation:
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Answer:
A: 11 protons and 21 neutrons
Explanation:
Hopefully this helps!
Answer:
The atomic radius of atoms generally decreases from left to right across a period. There are some small exceptions, such as the oxygen radius being slightly greater than the nitrogen radius. Within a period, protons are added to the nucleus as electrons are being added to the same principal energy level.
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Answer: Velocity
Explanation:
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