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Which of the following are the very small particles that make up matter?
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- 1. Intro to General Chemistry4h 5m
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- 24. Transition Metals and Coordination Compounds3h 19m
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2. Atoms & Elements
The Atom
Scelta multipla
What is the mass number for an atom of xenon containing 54 protons and 75 neutrons?
A
54
B
19
C
75
D
129
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Guida verificata passo dopo passo1
Identify the number of protons and neutrons given in the problem. Here, the atom has 54 protons and 75 neutrons.
Recall that the mass number (A) of an atom is the total number of protons and neutrons in its nucleus.
Write the formula for the 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: \(A = 54 + 75\).
Add the numbers to find the mass number, which represents the total nucleons in the atom.
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