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How many protons are present in a neutral chlorine (Cl) atom?
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- 1. Intro to General Chemistry4h 5m
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2. Atoms & Elements
The Atom
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An atom has a mass number of 210 and an atomic number of 85. How many neutrons does this atom have?
A
125
B
210
C
85
D
295
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Guida verificata passo dopo passo1
Identify the given values: the mass number (A) is 210, and the atomic number (Z) is 85.
Recall that the atomic number (Z) represents the number of protons in the atom.
Understand that the mass number (A) is the total number of protons and neutrons in the nucleus.
Use the formula to find the number of neutrons (N): \(N = A - Z\).
Substitute the given values into the formula: \(N = 210 - 85\), which will give the number of neutrons.
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