Chapter 2 – Atoms, Ions, and the Periodic Table

lie along the border between metals and nonmetals on the periodic table. GROUP NAMES, VALENCE ELECTRONS, and IONS. Groups 1, 2, and 13 - 18 (Group A elements) are called _____ (main group) elements. Groups 3 - 12 (Group ____ elements) are called transition elements. ................
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