Unit 3 Vocabulary

Atomic emission spectrum – the variety of frequencies of electromagnetic radiation (light) seen through a spectroscope that are emitted by electrons as they transition from higher to lower energy levels; unique for each element.

Atomic radius – a measure of the size on an atom of an element from the nucleus to the outer electrons.

Chemical family – a group of elements with similar chemical properties.

Electromagnetic spectrum – all of the frequencies of electromagnetic radiation or light.

Electronegativity – a chemical property that describes the extent to which an atom attracts electrons towards itself; cannot be directly measured.

Frequency –the number of cycles of an event per unit time; one Hertz (Hz) means one cycle per second.

Ionic radius – a measure of the size of an ion of an element in a crystal (usually measured by taking half the distance between two nuclei).

Ionization energy –a chemical property that describes the amount of energy required to remove an electron from an atom.

Isotopes – atoms of an element that have the same atomic number (protons) but different mass numbers due to different numbers of neutrons in their nuclei.

Planck’s constant – a constant value that relates the energy of a photon of light to its frequency.

Valence electrons – those electrons involved in the formation of chemical bonds.

Wavelength –the length between successive peaks (or troughs) of a wave. Unit 3 Vocabulary Atomic emission spectrum

Atomic radius

Unit 3 Vocabulary Chemical family

Electromagnetic spectrum

Unit 3 Vocabulary Electronegativity

Frequency

Unit 3 Vocabulary Ionic radius

Ionization energy

Unit 3 Vocabulary Isotopes

Planck’s constant

Unit 3 Vocabulary Valence electrons

Wavelength Unit 3 Vocabulary

Definition: the variety of frequencies of electromagnetic radiation (light) seen through a spectroscope that are emitted by electrons as they transition from higher to lower energy levels; unique for each element. Unit 3 Vocabulary Definition: a measure of the size on an atom of an element from the nucleus to the outer electrons. Unit 3 Vocabulary Definition: a group of elements with similar chemical properties.

Unit 3 Vocabulary

Definition: all of the frequencies of electromagnetic radiation or light. Unit 3 Vocabulary

Definition: a chemical property that describes the extent to which an atom attracts electrons towards itself; cannot be directly measured. Unit 3 Vocabulary

Definition: the number of cycles of an event per unit time; one Hertz (Hz) means one cycle per second. Unit 3 Vocabulary Definition: a measure of the size of an ion of an element in a crystal (usually measured by taking half the distance between two nuclei). Unit 3 Vocabulary

Definition: a chemical property that describes the amount of energy required to remove an electron from an atom. Unit 3 Vocabulary Definition: atoms of an element that have the same atomic number (protons) but different mass numbers due to different numbers of neutrons in their nuclei. Unit 3 Vocabulary

Definition: a constant value that relates the energy of a photon of light to its frequency. Unit 3 Vocabulary

Definition: those electrons involved in the formation of

chemical bonds. Unit 3 Vocabulary

Definition: the length between successive peaks (or troughs) of a wave.