Here’s the information for manganese (Mn):
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Atomic number: 25
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Atomic mass: 54.938
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# of protons: 25 (equal to the atomic number)
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# of neutrons: To find the number of neutrons, subtract the atomic number from the atomic mass (rounded to the nearest whole number):
\[ \text{Number of neutrons} = \text{Atomic mass} - \text{Atomic number} = 55 (rounded) - 25 = 30 \text{ (approximately, since atomic mass is not a whole number)} \]
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# of electrons: 25 (in a neutral atom, the number of electrons is equal to the number of protons)
So in summary:
- Atomic number: 25
- Atomic mass: 54.938
- # of protons: 25
- # of neutrons: 30 (approx.)
- # of electrons: 25