10 Questions
What are periodic trends in chemistry?
Specific patterns in the periodic table that illustrate different aspects of certain elements when grouped by period and/or group.
Who discovered periodic trends?
Dmitri Mendeleev
List some major periodic trends.
Atomic radius, ionization energy, electron affinity, electronegativity, valency, and metallic character.
Why do periodic trends exist?
Because of the similar electron configurations of the elements within their respective groups or periods.
What does atomic radius represent?
The distance from the atomic nucleus to the outermost electron orbital in an atom.
What are the major periodic trends and why do they exist?
The major periodic trends are atomic radius, ionization energy, electron affinity, electronegativity, valency, and metallic character. These trends exist because of the similar electron configurations of the elements within their respective groups or periods.
How does atomic radius change across a period and down a group?
Atomic radius decreases as we move from left to right in a period and increases as we go down a group.
What is the definition of atomic radius?
Atomic radius is the distance from the atomic nucleus to the outermost electron orbital in an atom.
Why does atomic radius decrease across a period?
Atomic radius decreases across a period because the effective nuclear charge increases, pulling the electrons closer to the nucleus.
Why does atomic radius increase down a group?
Atomic radius increases down a group because there are more energy levels or shells, resulting in a larger atomic size.
Test your knowledge of periodic trends in this chemistry quiz! Explore concepts such as atomic radius, ionization energy, electron affinity, electronegativity, valency, and metallic character. Challenge yourself and see how well you understand the patterns that exist in the periodic table.
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