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Write the formula for ibuprofen: 13 carbons, 18 hydrogens, and 2 oxygens. What are the common uses of ibuprofen?
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4. Atoms and Elements
The Atom (Simplified)
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In the simplified atomic model, most of an atom is best described as which of the following?
A
Electrons packed together, filling most of the atom’s volume
B
A solid sphere of positively charged material
C
The nucleus, which occupies most of the atom’s volume
D
Empty space between the nucleus and the electrons
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Recall the basic structure of an atom: it consists of a nucleus at the center and electrons surrounding it.
Understand that the nucleus contains protons and neutrons and is very small compared to the overall size of the atom.
Recognize that electrons occupy regions around the nucleus called electron clouds or orbitals, which define the atom's volume.
Note that despite electrons being present, most of the atom's volume is actually empty space between the nucleus and the electrons.
Conclude that the simplified atomic model describes most of the atom as empty space, with a tiny dense nucleus and electrons spread out around it.
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