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Unformatted text preview: 9-4-02Cell ChemistryA. Elements1.Element- one type of atom-Compound- more than one type of atom bonded chemically- Molecule- more than one atoma. Macroelements(macronutrients)- elements we use in large quantitiesEx) C, H, O (65%), Nb. Microelements(micronutrients)- elements we use in small quantitiesEx)Mg (digest chlorophyll), Fe(hemoglobin, cytochromes), Iodine (thyroids), copper, Mn (enzymes)2. Atomic Structurea. Atom- smallest unit of an element that still retains the chemical properties of that element.b. Proton- positively charged subatomic particle found in nucleusc. Neutron- neutrally charged subatomic particle found in nucleusd. Electron- negatively charged subatomic particle found outside nucleuse. Atomic Number- the number of protons in an atom denoted by the subscripted number Ex) 1H Atomic numberf. Atomic Mass- the number of protons and neutrons found in an atom, denoted by the superscripted number Ex) 1 H Atomic Massg. Isotopes-The more massive the isotope, the more unstable; the isotope...
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