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How many electrons are present in a neutral atom of elemental sodium (Na)?
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2. Atoms & Elements
The Atom
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Where are protons and neutrons located in an atom?
A
In the electron cloud
B
In the outermost energy level
C
In the nucleus
D
Randomly distributed throughout the atom
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Understand the structure of an atom, which consists of three main subatomic particles: protons, neutrons, and electrons.
Recall that protons and neutrons are found together in the central part of the atom called the nucleus.
Recognize that electrons are located in the electron cloud, which surrounds the nucleus and occupies the outer energy levels.
Note that the nucleus contains almost all the mass of the atom because protons and neutrons are much heavier than electrons.
Therefore, the correct location of protons and neutrons is in the nucleus, not in the electron cloud or outermost energy levels.
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