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Name
Class
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Skills Worksheet
Concept Review
Section: Atomic Structure
1. Draw and label the parts of a helium atom. Include the mass and charge of
each subatomic particle.
2. Describe the three main ideas of Dalton’s atomic theory in your own words.
3. Compare the outermost electrons of an atom with the inner electrons of an
atom in terms of energy.
4. Compare the positions of the electrons in Bohr’s model of the atom with
their positions according to modern atomic theory.
Copyright © by Holt, Rinehart and Winston. All rights reserved.
Holt Science Spectrum
1
Atoms and the Periodic Table