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Which of the following is the number of protons found in an atom of iodine?
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2. Atoms & Elements
The Atom
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What is the mass number for an atom of osmium containing 76 protons and 113 neutrons?
A
189.2
B
113
C
76
D
189
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Guida verificata passo dopo passo1
Recall that the mass number of an atom is the total number of protons and neutrons in its nucleus.
Identify the number of protons given in the problem, which is 76 for this osmium atom.
Identify the number of neutrons given in the problem, which is 113 for this osmium atom.
Use the formula for mass number: \(\text{Mass Number} = \text{Number of Protons} + \text{Number of Neutrons}\).
Add the number of protons (76) and neutrons (113) to find the mass number: \(76 + 113\).
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