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Chapter 17-18

Physical science

included aspects of chemistry, philosophy, religion, metallurgy, medicine, and art? Alchemy
how many elements are there? 117
how many natural elements are there? 92
monatomic elements have how many atoms in their natural state? 1
Diatomic elements have how many atoms in their natural state? 2
Who arranged the elements on the periodic table that we use today? Dmitri Mendeleev
who arranged the elements into triads? Johann Dobereiner
Who arranged the elements in the periodic table in order of their increasing atomic masses and seven columns? John Newlands
what is periodicity? the repetition of certain properties at regular intervals when elements were placed in order of atomic mass.
what is the periodic law? elements vary in a periodic order with their atomic numbers.
what are the properties of metal? luster, malleable, conduct electricity, ductile.
what are the horizontal rows on the periodic table called? periods or series.
what is the ground state? the lowest energy state for the electron.
what is the law that states that atoms are most stable when they have 8 electrons in there valence energy level? Octet rule.
what is electron affinity? the strength of attraction of electron to unbounded atoms.
elements that lose electrons are called what? cations.
elements that gain electrons are called what? Anions.
Covalent bond is a mix of what 2 elements? Non-metal and non-metal.
Ionic bond is a mix of what 2 elements? Metal and non-metal.
Metallic bond is a mix of what 2 elements? Metal and Metal.
what are halogens? elements in the 7th row and include fluorine, chlorine, bromine, iodine, and astatine.
Created by: jacob98