Valence Electrons Worksheet
An 8th-grade science worksheet focusing on understanding valence electrons, their role in chemical bonding, and how to determine them for various elements.
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Valence Electrons Worksheet
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Read each question carefully and answer to the best of your ability. Use your knowledge of valence electrons to complete the tasks.
1. What are valence electrons?
Electrons found in the nucleus of an atom
Electrons in the outermost shell of an atom
Electrons that are not involved in bonding
Electrons that orbit the atom randomly
2. Why are valence electrons important in chemistry?
They determine the atom's mass.
They are responsible for an atom's color.
They are involved in chemical bonding and reactions.
They protect the nucleus from outside forces.
3. Atoms tend to gain, lose, or share valence electrons to achieve a stable outer shell, typically with electrons, a rule known as the octet rule.
4. The group number on the periodic table can often tell you the number of an atom has.
5. All atoms have exactly 8 valence electrons.
True
False
6. Elements in the same group (column) on the periodic table have the same number of valence electrons.
True
False
7. How many valence electrons does a Sodium (Na) atom have? Explain how you determined this.
8. Draw a simplified diagram of an atom showing its nucleus and electron shells. Clearly label the valence electrons in the outermost shell.
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