Periodicity of Valency or Oxidation States
Analyzes the combining capacity of elements and their common oxidation states in relation to their position in the periodic table.
What is Periodicity of Valency or Oxidation States?
The number of electrons an atom can lose, gain, or share to form a chemical bond.
Key points
- Define valency and oxidation state.
- Explain the periodic trends in valency and oxidation states across periods and down groups.
- Predict the common valencies and oxidation states of elements based on their position in the periodic table.
- Differentiate between valency and oxidation state.
Common exam trap
Confusing valency with oxidation state.
Definitions
- Term
Valency
- Meaning
The number of electrons an atom can lose, gain, or share to form a chemical bond.
- Term
Oxidation State
- Meaning
A number assigned to an element in chemical combination which represents the number of electrons lost or gained by an atom of that element in order to form that chemical species.
Learning objectives
Define valency and oxidation state.
Explain the periodic trends in valency and oxidation states across periods and down groups.
Predict the common valencies and oxidation states of elements based on their position in the periodic table.
Differentiate between valency and oxidation state.
Understand the factors influencing these periodic trends.
Prerequisites
Atomic Structure
Electronic Configuration
Periodic Classification of Elements
Basic Chemical Bonding Concepts
Common mistakes
Confusing valency with oxidation state.
Assuming constant valency/oxidation state across a period or group.
Forgetting the exceptions to general trends.
Incorrectly applying the group number rule to transition metals.
Not considering the role of d-electrons in transition metal oxidation states.
Keywords
Valency
Oxidation State
Periodic Trends
Group Number
Period Number
Electronic Configuration
Representative Elements
Transition Metals
Combining Capacity
Practice preview
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