CHEM 101 Study Guide - Midterm Guide: Phosphorus Trichloride, Alkaline Earth Metal, Lead
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Page 2: what is the most abundant element by mass on the earth (including the crust, oceans, and atmosphere), silicon, oxygen, hydrogen, carbon. E) iron: the symbol for the element silver is, s, si, ag, au, sr, the symbol pb stands for the element, phosphorus, palladium, polonium. D) twelve atoms of each element: one atom of each element, how many protons, electrons, and average number of neutrons, respectively, does. Page 3: 28, 28, 28, 28, 28, 59, 31, 28, 59, 28, 28, 31, how many total atoms are represented by one formula unit of barium carbonate, Baco3: 5, 6, 14, 18, 25, the maximum number of electrons allowed in one orbital is, 2, 4, 8, 18, none of these, there is a combined maximum of 8 valence electrons in the s and p orbitals. What element(s) have 7 valence electrons: oxygen, all elements on the periodic table. D: 1s21p62s22p1, what is the element represented by 1s22s2, hydrogen, helium.
