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Where is most of the mass of an atom located?
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- 1. Intro to General Chemistry4h 5m
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- 23. Chemistry of the Nonmetals2h 39m
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- 24. Transition Metals and Coordination Compounds3h 19m
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- Electron Configurations of Transition Metals7m
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- Complex Ions5m
- Coordination Complexes7m
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- Magnetic Properties of Complex Ions9m
- Strong-Field vs Weak-Field Ligands6m
- Magnetic Properties of Complex Ions: Octahedral Complexes11m
2. Atoms & Elements
The Atom
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What is the mass number for an atom of barium containing 56 protons and 82 neutrons?
A
112
B
138
C
56
D
82
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Guida verificata passo dopo passo1
Identify the number of protons and neutrons given in the problem. Here, the atom has 56 protons and 82 neutrons.
Recall that the mass number (A) of an atom is the total number of protons and neutrons in its nucleus.
Use the formula for mass number: \(A = Z + N\), where \(Z\) is the number of protons and \(N\) is the number of neutrons.
Substitute the given values into the formula: \(A = 56 + 82\).
Add the numbers to find the mass number, which represents the total nucleons in the atom.
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