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Bio/Int. 2- Lesson 4

Chemistry of Life

TermDefinition
Atom the basic unit of matter that cannot be broken down by chemical means
Proton subatomic particle located within the nucleus, has a positive charge
Neutron subatomic particle located within the nucleus, has a neutral charge
Electron subatomic particle located moving around the nucleus, has a negative charge
Element pure substance made of only one kind of atom
Compound substance made up of two or more different elements
Ionic Bond bond formed when one or more electrons are transferred from one atom to another
Covalent Bond bond formed by the sharing of electrons between atoms
Molecule a group of atoms held together by covalent bonds
Carbohydrate compound made up of carbon, hydrogen, and oxygen atoms; major source of energy for organisms
Lipids molecule made mainly from carbon and hydrogen atoms; includes fats, oils, and waxes
Nucleic Acid large molecule containing hydrogen, oxygen, nitrogen, carbon, and phosphorus; main component of DNA and RNA, main functions are information storage, energy transfers, and protein synthesis
Created by: ECOTScience10-11
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