Valence Electrons Worksheet
A Grade 10 science worksheet focusing on understanding valence electrons, their role in chemical bonding, and how to determine their number for various elements.
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Topics
Valence Electrons Deep Dive
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Read each question carefully and provide your best answer. Show all your work for calculations.
1. What are valence electrons primarily responsible for in an atom?
Determining the atomic mass
The atom's radioactivity
Chemical bonding and reactivity
The number of protons
2. How many valence electrons does an atom of Oxygen (O) have?
2
4
6
8
3. Valence electrons are found in the electron shell of an atom.
4. Atoms tend to gain, lose, or share electrons to achieve a stable outer shell, typically with valence electrons, according to the octet rule.
5. Explain how the number of valence electrons determines an element's position on the periodic table.
6. All elements in the same period have the same number of valence electrons.
True
False
7. Consider the simplified atomic structure diagram below. Identify the valence electrons and explain their significance.
Match each element with its corresponding number of valence electrons.
8. Lithium (Li)
a. 7
9. Carbon (C)
b. 1
10. Chlorine (Cl)
c. 4