Multiple Choice
In the simplified atomic model, what is the smallest unit of an element that still retains that element’s chemical identity?
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4. Atoms and Elements
The Atom (Simplified)
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In the simplified model of the atom, which region is mostly empty space?
A
The region between the nucleus and the electrons (the electron cloud region)
B
The nucleus
C
Neutrons
D
Protons
Verified step by step guidance1
Recall the basic structure of an atom, which consists of a nucleus at the center and electrons surrounding it in a region called the electron cloud.
Understand that the nucleus contains protons and neutrons, which are densely packed together, making the nucleus very small but massive compared to the rest of the atom.
Recognize that electrons occupy the electron cloud, which is a much larger region around the nucleus where electrons are likely to be found.
Note that the space between the nucleus and the electrons is mostly empty because electrons are tiny and spread out, and there is a lot of space between the nucleus and the electron cloud.
Conclude that the region mostly empty space in the simplified atomic model is the area between the nucleus and the electrons, often referred to as the electron cloud region.
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