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CH 9 CHEM
Terms in this set (18)
when the elements are arranged in order of increasing atomic mass, certain sets of properties recur periodically
bring together elements with similar properties
main group elements
the first two groups (the s-block) and the last six groups (the p-block) constitute the ?
because they come between the s-block and p-block, the d-block elements are known as ?
inner transition elements
the f-block elements ( ? ) are extracted from the table and placed below it purely for aesthetic purposes
the 15 elements following Barium (Z=56) are called the ?
the 15 elements following Radon (Z = 88) are the ?
arranged in order of increasing atomic number form left to right
one half the distance between the nuclei of two identical atoms joined by a single covalent bond
one half the distance between the nuclei of two atoms in contact in the crystalline solid metal
based on the distance between nuclei joined through an ionic bond; since the ions differ in size, the distance must be properly apportioned between the cation and the anion
van der Waals radius
one half the internuclear separation of two non-bonded atoms of the same element on their closest possible approach (noble gas)
ions that have the same number of electrons in identical configurations
ionization energy (IE)
the energy required for the complete reveal of one mole of electrons from one mole of gaseous atoms or ions
electron affinity (EA)
the energy change that accompanies the addition of one mole of electrons to one mole of gaseous atoms or ions
the ability of an atom in bond to attract electron density toward itself
diamagnetic atoms or ions
have all electrons paired and individual magnetic effects cancel out
paramagnetic atoms or ions
have unpaired electrons and individual magnetic effects do not cancel out
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