4.3 Distinguishing Among Atoms

4.24, Assessment 4.3 • Go Online, Section 4.3 4.3 FOCUS Objectives 4.3.1 Explain what makes elements and isotopes different from each other. 4.3.2 Calculate the number of neu-trons in an atom. 4.3.3 Calculate the atomic mass of an element. 4.3.4 Explain why chemists use the periodic table. Guide for Reading Build Vocabulary Graphic Organizer ... ................
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