Multiple Choice
Which feature defines a neutral atom?
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4. Atoms and Elements
The Atom (Simplified)
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How many protons are in an atom of bromine, ?
A
115
B
80
C
35
D
45
Verified step by step guidance1
Identify the element in question, which is bromine (Br).
Recall that the number of protons in an atom is equal to the atomic number of the element.
Look up the atomic number of bromine on the periodic table; this number is unique to each element and represents the number of protons.
Note that the atomic number of bromine is 35, meaning every bromine atom has 35 protons.
Understand that the other numbers given (115, 80, 45) could represent mass numbers or other values, but they do not correspond to the number of protons.
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