CHEM-UA 109 Lecture Notes - Lecture 5: Transition Metal, Roman Numerals, Iodine
23 Aug 2016
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Document Summary
Usually solid t room temperature of both (insulators) (except mercury) Alkali metals (left hand column) react violently with water and oxidize quickly. Group: a column of the periodic table of elements. Period: a row of the periodic table of elements. The amount of energy required to steal the first electron from an element"s outer shell. The ability of an element to hold on to its electrons. aka. Ie and en trends are displayed on figure 2 on this page. Atoms steal enough electrons to fill their outer shells to the maximum (octet), with a a few exceptions that can go above, extending into the d-orbital. Gaining electrons increases size because more electrons equals more en, because the electrons repel each other and expand the size of the atom. Crisscross method demonstrated in figure 3 on this page. Empirical formula: lowest whole number ratio of ions in a compound. Polyatomic ion: ions made of more than 1 atom by covalent bonds.
