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vocab quiz

TermDefinition
Group Every vertical column of a periodic table
Period Every horizontal row of a periodic table
Atom The smallest particle of an element that retains its identity in a chemical reaction
Atomic mass The weighted average mass of the atoms in a naturally occurring sample
Atomic Number The number of protons in the nucleus of an atom of that element
Electron Negatively charged sub-atomic particles
Isotopes Atoms that have the same number of protons but different number of neutrons
Mass number The total number of protons and neutrons in an atom
Nucleon Sub-atomic particles with no charge but with a mass nearly equal to that of a proton
Nucleus The tiny central core of an atom and is composed of protons and neutrons
Proton Positively charged sub-atomic particles
Atomic Emission Spectrum The wavelengths of spectral lines
Atomic Orbital The mathematical expression of Schrödinger's equation
Excited State When an electron absorbs energy, it moves to a higher energy level than normal
Ground State The lowest energy level of an electron
Alkali metals Group 1A on the periodic table
Alkaline Earth metals Group 2A on the periodic table
Anion An ion with a negative charge
Atomic Radius 1/2 of the distance between the nuclei of two atoms of the same element when the atoms are joined
Cation An ion with a positive charge
Electronegativity The ability of an element to attract electrons when the atom is in a compound
Halogens Non-metals of group 7A on the periodic table
Ion An atom/group of atoms that has a positive or negative charge
Ionization Energy The energy required to remove an electron from an atom
Metalloids The heavy stair-step line on the periodic table
Metals All yellow squares on the periodic table
Noble Gases Group 8A on the periodic table
Non-metals Poor conductors of heat and electric current
Transition Metal Elements in groups 3-12 on the periodic table, known for making very colorful compounds and solutions
Created by: user-2056721
 

 



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