Multiple Choice
Which of the following best describes the primary composition of a typical white dwarf star?
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2. Atoms & Elements
The Atom
Multiple Choice
How many protons are present in the nucleus of a fluorine atom?
A
19
B
7
C
11
D
9
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Verified step by step guidance1
Recall that the number of protons in the nucleus of an atom is given by the atomic number of the element.
Identify the element in question, which is fluorine in this problem.
Look up the atomic number of fluorine on the periodic table; the atomic number corresponds to the number of protons.
Note that fluorine has an atomic number of 9, meaning it has 9 protons in its nucleus.
Therefore, the number of protons in a fluorine atom is 9.
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