Chapter 3 Vocab Words

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Chapter 3 Vocab Words

Chapter 3 Voc Ab Words

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all the frequencies or wavelenths of electromagnectic radiation
Electromagnetic spectrum
the lowest energy state of a quantized system
ground state
two electrons cannot occupy the same place at the same time
Pauli's exclusion
an atom's central region, which is made up of protons and neutrons
the sum of the numbers of protons and neutrons in the nucleus of the atom
Mass number
a region in an atom where there is a high probability of finding electrons
the structure of each successive element is obtained by adding electrons to the lowest orbital avail
Aufbau principle
a number that specifies the properties of electrons
Quantum number
a subatomic particle that has a positive charge and is found in the nucleus
a subatomic particle that has no charge and that is found in the nucleus
a state in which an atom has more energy than it does at its ground state
excited state
a chemical compound always contains the same elements in exactly the same proportions
Definite Proportions
two elements can combine to form two or more compounds
Multiple proportions
atoms of the same element that have the same number of protons but different numbers of neutrons
the number of protons in the nucleus of an atom
atomic number
mass cannot be created or destroyed in ordinary chemical and physical changes
Conservation of Mass
the arrangement of electrons in an atom
electron configuration
a subatomic particle that has a negative electric charge
the number of unpaired electrons is the maximum possible and unpaired electrons have the same spin
Hund's Rule
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