Valence Electrons Worksheet
A Grade 7 science worksheet focusing on understanding valence electrons, their role in chemical bonding, and how to determine their number.
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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. This worksheet will test your knowledge of valence electrons and their importance in chemistry.
1. Valence electrons are the electrons found in the shell of an atom.
2. The number of valence electrons an atom has determines its properties.
3. Atoms tend to gain, lose, or share electrons to achieve a stable outer shell, typically with valence electrons.
4. Elements in the same of the periodic table have the same number of valence electrons.
1. Which of the following best describes the role of valence electrons?
They determine the atom's mass.
They are responsible for nuclear reactions.
They are involved in chemical bonding.
They are located in the atom's nucleus.
2. How many valence electrons does an atom of Oxygen (O) typically have?
2
4
6
8
1. All electrons in an atom are valence electrons.
True
False
2. Noble gases have a full outer shell of valence electrons, making them highly reactive.
True
False
1. Explain why valence electrons are crucial for understanding how atoms bond with each other.
2. How can you determine the number of valence electrons for an element using the periodic table?
Use the words below to complete the sentences.