Multiple Choice
How many protons are present in a neutral chlorine (Cl) atom?
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- 1. Intro to General Chemistry3h 48m
- Classification of MatterBonus18m
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2. Atoms & Elements
The Atom
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
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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Verified step by step guidance1
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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