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Chapter 2 - Coggle Diagram

- - - - Compounds consist of two or more elements in fixed ratios and exhibit emergent properties
  - - - The mass of neutrons and protons is nearly identical and measured in daltons
  - - - Energy is defined as the capacity to cause change.
  - - - Radioactive isotopes are used as diagnostic tools in medicine
        
        PET scanners monitor the growth and metabolism of cancers in the body
      - Radioactive tracers help track atoms through metabolism
- - - - In a nonpolar covalent bond, atoms share electrons equally
      - covalent bond involves the sharing of a pair of valence electrons between two atoms
- - - - Elements are substances that cannot be broken down to other substances by chemical reactions
        
        All chemical reactions are reversible
        
        Trace elements are required by organisms in minute quantities
        
        Chemical equilibrium occurs when forward and reverse reactions happen at the same rate
      - Carbon, hydrogen, oxygen, and nitrogen make up 96% of living matter.
        
        Carbon, hydrogen, oxygen, and nitrogen make up 96% of living matter
        
        The remaining 4% consists of calcium, phosphorus, potassium, and sulfu