Multiple Choice
How is an atomic mass unit (amu) defined?
20
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2. Atoms & Elements
Atomic Mass
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Which of the following is the number of protons in a neutral atom of neon (Ne)?
A
20
B
8
C
10
D
12
Verified step by step guidance1
Recall that the number of protons in a neutral atom is equal to its atomic number.
Identify the element in question, which is neon (Ne).
Look up the atomic number of neon on the periodic table; this number represents the number of protons.
Understand that for a neutral atom, the number of protons equals the number of electrons, but the question only asks for protons.
Conclude that the number of protons in a neutral neon atom is the atomic number of neon.
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