Multiple Choice
How many protons are in an atom of bromine, ?
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4. Atoms and Elements
The Atom (Simplified)
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
In the simplified model of the atom, where are electrons located?
A
Evenly mixed throughout the atom as a uniform positive-negative sphere
B
Inside the nucleus with the protons and neutrons
C
In the electron cloud (orbitals) surrounding the nucleus
D
In a fixed, solid shell that contains both protons and electrons
Verified step by step guidance1
Recall the historical models of the atom: the plum pudding model suggested electrons were evenly mixed in a positive sphere, while the nuclear model placed protons and neutrons in the nucleus.
Understand that electrons are not located inside the nucleus; protons and neutrons reside there, making the nucleus dense and positively charged.
Learn that modern atomic theory describes electrons as existing in an electron cloud, which is a region around the nucleus where electrons are likely to be found, rather than fixed paths or shells.
Recognize that these electron clouds correspond to orbitals, which are probabilistic regions defined by quantum mechanics, not solid shells containing protons and electrons.
Therefore, in the simplified atomic model, electrons are located in the electron cloud (orbitals) surrounding the nucleus, not mixed uniformly or inside the nucleus.
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