What elements comprise 96% of living matter

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Presentation transcript:

9-1 1. What elements comprise 96% of living matter 9-1 1. What elements comprise 96% of living matter? What is the remaining 4% of living matter composed of? 2. Describe the nucleus of an atom. 3. Describe 2 differences and 2 similarities between covalent and ionic bonds. 4. What are 3 examples of substances formed by covalent bonding? What is an example of a substance formed by ionic bonding? WARM-UP Put date out to the side