객관식
Which of the following is considered the basic form of matter?
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- 1. Intro to General Chemistry3h 46m
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2. Atoms & Elements
The Atom
Multiple Choice
An atom of carbon-12 is being considered. How many protons does this atom have?
A
4
B
6
C
8
D
12
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검증된 단계별 안내1
Recall that the number of protons in an atom is defined by its atomic number, which is unique to each element.
Identify the element in question: carbon-12 refers to the isotope of carbon with a mass number of 12.
Understand that the atomic number of carbon is 6, meaning every carbon atom has 6 protons regardless of the isotope.
Note that the mass number (12 in carbon-12) is the sum of protons and neutrons, but it does not affect the number of protons.
Therefore, the number of protons in a carbon-12 atom is equal to the atomic number of carbon, which is 6.
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