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Which of the following is true of both the sodium and chlorine atoms?
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2. Atoms & Elements
The Atom
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How many protons are present in a neutral atom of fluorine?
A
11
B
19
C
7
D
9
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Guida verificata passo dopo passo1
Recall that the number of protons in a neutral atom is equal to the atomic number of the element.
Identify the element given in the problem, which is fluorine.
Look up the atomic number of fluorine on the periodic table; the atomic number represents the number of protons.
Note that the atomic number of fluorine is 9, meaning a neutral fluorine atom has 9 protons.
Confirm that the number of protons equals the number of electrons in a neutral atom, but the question only asks for protons.
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