Questions and Answers
What characteristic do alkali metals have?
Which of the following elements have 2 valence electrons?
Which element class includes elements that are never found pure in nature due to their high reactivity?
What is true about transition metals?
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What defines nonmetals?
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What is a common feature of noble gases?
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The group of elements known for having 7 valence electrons are called _____
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Elements that have properties of both metals and nonmetals are called _____
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What are lanthanides?
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What distinguishes actinides?
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Study Notes
Alkali Metals
- Possess 1 valence electron, making them highly reactive.
- Found only in compounds, never in pure form, due to their reactivity.
- Reactivity increases as you move down the group.
Alkaline Earth Metals
- Contain 2 valence electrons, leading to moderate reactivity.
- Less reactive than alkali metals and also not found pure in nature.
- The term "alkaline" signifies their basic properties.
Transition Metals
- Exhibit a variety of oxidation states and can form complex ions.
- Known for good conductivity of heat and electricity.
- Typically malleable, ductile, and possess high tensile strength and luster.
Other Metals
- Have distinct properties such as good conductivity and malleability, similar to transition metals.
Metalloids
- Display a mix of metal and nonmetal characteristics.
- More brittle than metals but less brittle than most nonmetals.
- Function as semiconductors, making them vital in electronics.
Nonmetals
- Poor conductors of heat and electricity; low tensile strength.
- Tend to be brittle as solids and many exist as gases at room temperature.
Halogens
- Contain 7 valence electrons, making them very reactive.
- Never occur in pure forms due to high reactivity, commonly form diatomic molecules (e.g., F2, Cl2).
Noble Gases
- Characterized by having 8 valence electrons, making them chemically inert.
- Occur naturally in pure form; are colorless and odorless.
- Among the last elements discovered due to their non-reactive nature.
Lanthanides
- Series of 15 chemical elements from lanthanum to lutetium.
- Known for their rare and valuable properties in electronics and optics.
Actinides
- Series of 15 elements from actinium to lawrencium.
- All are radioactive, with some (like uranium and plutonium) significant in nuclear energy.
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Description
Test your knowledge of the various classes of elements in the periodic table with these flashcards. Covering categories such as alkali metals, transition metals, and noble gases, this quiz is perfect for chemistry enthusiasts and students alike. Enhance your memory and understanding of chemical element classifications.
