Multiple Choice
In an atom, what occupies the space between the nucleus and the electrons?
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2. Atoms & Elements
The Atom
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following correctly describes the composition of a neutral atom of helium-4?
A
2 protons, 4 neutrons, and 2 electrons
B
2 protons, 2 neutrons, and 4 electrons
C
4 protons, 2 neutrons, and 4 electrons
D
2 protons, 2 neutrons, and 2 electrons
Verified step by step guidance1
Recall that a neutral atom has an equal number of protons and electrons to balance the positive and negative charges.
Identify the atomic number of helium, which is 2; this means helium has 2 protons in its nucleus.
Understand that the mass number of helium-4 is 4, which represents the total number of protons and neutrons combined.
Calculate the number of neutrons by subtracting the number of protons from the mass number: \(\text{neutrons} = 4 - 2\).
Confirm that the number of electrons equals the number of protons for a neutral atom, so helium-4 has 2 electrons.
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