Multiple Choice
In a simplified model of the atom, what is the central region containing protons and neutrons called?
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4. Atoms and Elements
The Atom (Simplified)
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In a simplified model of the atom, which part occupies the most volume?
A
The neutrons only
B
The nucleus (protons and neutrons)
C
The electron cloud (region where electrons are most likely to be found)
D
The protons only
Verified step by step guidance1
Understand the structure of an atom: it consists of a nucleus (containing protons and neutrons) and an electron cloud surrounding the nucleus.
Recall that the nucleus is very dense but extremely small compared to the entire atom.
Recognize that electrons occupy regions called orbitals or the electron cloud, which define the space where electrons are most likely to be found.
Compare the relative sizes: the nucleus occupies a tiny central volume, while the electron cloud extends over a much larger volume, making up most of the atom's size.
Conclude that the electron cloud occupies the most volume in the atom, even though it contains very little mass compared to the nucleus.
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