Flashcards on Periodic Trends

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What is periodicity in the context of the periodic table?

The repeating pattern of chemical and physical properties of elements across the periodic table.

Which properties of elements change predictably across the periodic table?

Atomic radius, ionization energy, electronegativity, and metallic character.

What is atomic radius?

The distance from the nucleus to the outermost electron in an atom.

How does atomic radius change across a period in the periodic table?

Atomic radius generally decreases from left to right across a period.

How does atomic radius change down a group in the periodic table?

Atomic radius generally increases from top to bottom within a group.

What is ionization energy?

The energy required to remove an electron from an atom to form a positive ion.

How does ionization energy change across a period in the periodic table?

Ionization energy generally increases from left to right across a period.

How does ionization energy change down a group in the periodic table?

Ionization energy generally decreases from top to bottom within a group.

What is electronegativity?

A measure of an atom's ability to attract and hold electrons in a chemical bond.

How does electronegativity change across a period in the periodic table?

Electronegativity generally increases from left to right across a period.

How does electronegativity change down a group in the periodic table?

Electronegativity generally decreases from top to bottom within a group.

What is metallic character?

A measure of how easily an element loses electrons and forms positive ions.

How does metallic character change across a period in the periodic table?

Metallic character generally decreases from left to right across a period.

How does metallic character change down a group in the periodic table?

Metallic character generally increases from top to bottom within a group.

What are the main factors that influence periodic trends?

Nuclear charge, shielding effect, and electron-electron repulsion.

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Test Your Knowledge


Which property describes the distance from the nucleus to the outermost electron in an atom?



Which property generally increases from left to right across a period in the periodic table?



Which property generally increases from top to bottom within a group in the periodic table?



Which property refers to an atom's ability to attract and hold electrons in a chemical bond?



Which property generally decreases from left to right across a period in the periodic table?



Which property generally decreases from top to bottom within a group in the periodic table?



Which property describes how easily an element loses electrons and forms positive ions?



What influences periodic trends in the periodic table?



Which property is a measure of an atom's ability to attract and hold electrons in a chemical bond?



Which property describes the energy required to remove an electron from an atom to form a positive ion?




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