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Periodic Properties of the Elements
chapter 7
12
Chemistry
12th Grade
01/02/2013

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Term
valence orbitals
Definition
orbitals that contain the outershell electrons of an atom
Term
effective nuclear charge
Definition
the net positive charge experienced by an electron in a many-electron atom; this charge is not the full nuclear charge because there is some shielding of the nucleus by the other electrons in the atom
Term
bonding atomic radius
Definition
the radius of an atom as defined by the distances separating it from other atoms to which it is chemically bonded
Term
ionization energy
Definition
the energy required to remove an electron from a gaseous atom when the atom is in its ground state
Term
electron affinity
Definition
the energy change that occurs when an electron is added to a gaseous atom or ion
Term
metallic character
Definition
the extent to which an element exhibits the physical and chemical properties characteristic of metals
Term
alkali metals
Definition
members of group 1A in the periodic table
Term
alkaline earth metals
Definition
members of the group 2A in the periodic table
Term
hydride ion
Definition
an ion formed by the addiction of an electron to a hydrogen atom
Term
ozone
Definition
the name given to the O3 an allotrope of oxygen
Term
halogens
Definition
members of group 7A in the periodic table
Term
noble gases
Definition
members of group 8A in the periodic table
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