Valence Electrons Worksheet
This worksheet covers the concept of valence electrons, their importance in chemical bonding, and how to determine their number for various elements.
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Valence Electrons: The Key to Chemical Reactions
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Read each question carefully and answer to the best of your ability. Show all your work where applicable.
1. What are valence electrons?
Electrons found in the innermost shell of an atom.
Electrons involved in holding the nucleus together.
Electrons in the outermost shell of an atom that participate in chemical bonding.
Electrons that orbit the nucleus randomly.
2. How many valence electrons does an atom of Oxygen (O) typically have?
2
4
6
8
3. The number of valence electrons determines an element's chemical .
4. Atoms tend to gain, lose, or share electrons to achieve a stable outer shell, typically with valence electrons, a concept known as the rule.
5. Explain the significance of valence electrons in the formation of ionic bonds.
6. Describe how valence electrons are involved in covalent bonding.
7. All elements in the same group (column) of the periodic table have the same number of valence electrons.
True
False
8. Noble gases are highly reactive because they have a full outer shell of valence electrons.
True
False
9. Consider the Bohr model of an atom below:
a) How many valence electrons are shown in this atomic model?
b) Based on the number of valence electrons, what group on the periodic table might this element belong to?