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contains the transition metals and is the largest of the blocks


contains the inner transition metals


an atom or bonded group of atoms that have a + or - charge

ionized energy

required to move an electron from an atom

octet rule

states that atoms tend to gain, lose, or share electrons in order to acquire a full set of eight valence electrons


indicates the relative ability of an atom to attract electrons in a chemical bond


most electronegative atom


the least electronegative atom


have both chemical and physical properties

group 17(7A)


group 18(8A)

noble gases

group 1(1A)

alkali metals

group 2(2A)

alkaline earth metals

group 3-12 (all the B groups)

transition elements

inner transition metals

the TWO sets at the BOTTOM of the PTable known as the LANTHANIDE series and the ACTINIDE series


french - 1st 23 elements


english - proposed an organization scheme called the LAW of OCTAVS


composed the 1st PTable


composed the modern day periodic table

periodic law

when the elements are arranged in order of increasing atomic number, there is a periodic pattern in their PHYSICAL & CHEMICAL properties


horizontal rows


vertical columns

valence electrons

groups 1(1A), 2(2A), 13-18(3A-8A)


radioactive elements

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