Valence Electrons Worksheet
This worksheet explores the concept of valence electrons, their role in chemical bonding, and how they determine an element's reactivity, suitable for Grade 12 Chemistry students.
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Valence Electrons: The Key to Chemical Behavior
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. What are valence electrons?
Electrons in the innermost shell
Electrons involved in chemical bonding
Electrons with the highest energy
Both b and c
2. How many valence electrons does an atom of Oxygen (O) have?
2
4
6
8
1. Elements in the same group (column) of the periodic table have the same number of valence electrons.
True
False
2. Noble gases are highly reactive because they have a full outer shell of valence electrons.
True
False
1. The maximum number of valence electrons an atom can have is .
2. Atoms tend to achieve a stable electron configuration by gaining, losing, or sharing electrons to complete their shell.
1. Explain the octet rule and its significance in chemical bonding.
2. How does the number of valence electrons influence an element's position on the periodic table and its chemical properties?
Match the element with its typical number of valence electrons.
1. Sodium (Na)
a. 7
2. Chlorine (Cl)
b. 2
3. Calcium (Ca)
c. 1