Multiple Choice
How many Cl2O molecules of different masses (isotopologues) naturally exist due to the presence of stable isotopes of chlorine and oxygen?
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- 1. Intro to General Chemistry3h 48m
- Classification of Matter18m
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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
How many protons are present in a nitrogen atom with a 3- charge?
A
4
B
3
C
10
D
7
Verified step by step guidance1
Recall that the number of protons in an atom is determined by its atomic number, which is unique to each element and does not change with charge.
Identify the element in question: nitrogen. The atomic number of nitrogen is 7, meaning every nitrogen atom has 7 protons.
Understand that the 3- charge indicates the atom has gained 3 extra electrons, but this does not affect the number of protons.
Therefore, the number of protons in a nitrogen atom with a 3- charge remains the same as in a neutral nitrogen atom, which is 7.
Conclude that the answer is 7 protons, regardless of the charge on the nitrogen atom.
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