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Chapter 2 Worksheet Answers.docx - Chapter 2 Basic Chemistry Answers ... Chapter 2 Basic Chemistry Answers These 4 elements form approximately 96% of almost all life forms. C, H, O, N The atomic number of an atom representsThe number of protons The atomic mass of an atom represents The number of protons +the number of neutrons Oxygen has an atomic number of 8 and an atomic mass of 16.

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Chp_2_BasicChemistryworksheetAP (1).doc - AP Biology Chemical bonds are determined by _the sharing of_ electrons in the outer shells of atoms. 13. _Covalent_ bonds are between electrons of atoms that share electrons. 14. _Non-polar_ covalent bonds are between atoms which share the e- equally. Atoms will vary in their _bond-lengths__ and are often driven to pull on electrons from covalent bonds. 15.