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Chem unit 2

TermDefinition
Alkali metals Group 1 on the periodic table. Highly reactive!
Alkaline earth metals Group 2 on the periodic table. Highly reactive!
Atom Most basic unit of matter
Atomic number Number of protons in an atom of that element
Average atomic mass the weighted average mass of the atoms in a naturally occurring sample of the element
Electron affinity The likelihood of an element to attract an electron
Electrons Negatively charged particles in an atom
Families a group of elements that have certain similar properties and can form compounds with some similar properties
Halogens Group 17 on the periodic table. Highly reactive!
Mass number The total number of protons and neutrons in the nucleus
Neutrons Neutral particles located in the nucleus of an atom
Noble gases Group 18 of the periodic table. Non-reactive.
Nucleus Positively charged center of an atom
Oxidation numbers number of electrons an atom can accept or donate to form a bond with another atom
Protons Positive particles located in the nucleus of an atom
Subatomic particles Particles inside an atom
Transition metals Groups 3-12. Good conductors.
Created by: user-1721598
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