The Chemical Basics of Life

Atom- is the basic unit of matter in the study of chemistry
Nucleus- is the center of the atom, this organelle contains the protrons and nuetrons
Electron- Is a negative charged molecule that are in constsant motion in the space surrounding the nucleus
Proton- positivly charged ion
Neutron- is a neutral ion that has no charge
Element- is a pure substance that consists entirely of one type of atom
Isotope- atoms of the same element that have a different number of neutrons
Compound-is a substance formed by chemical combinations of two or more elements in definite proportions
Ionic Bond- is formed when one or more elctrons are transferred from one atom to another
Covalent Bond- is a bond formed when electrons are shared
Propertie of Water
Molecule- is the smallest unit of most compounds
Water Molecule- is neutral like all molecules it consists of 10 protrons and electrons it is also a polar molecule what this means is that their is an unevan distributation of electrons between the oxygen and hydrogen atoms
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Cohesion- is the attraction between molecules of the same substance
Adhesion- is the attraction between molecules of diffrent substances
Mixture- is a material composed of two or more elements or compounds that are physically mixed together but not chemically
Solution- Is a mixture where all of the components are evenly distributed
Solute- is the substance being dissolved
Solvent- is the substance doing the dissolving
Suspension- are mixtures that have materials that don't dissolve in the water when mixed
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pH scale- system used to indicate the number of H+ ions in a solution
Acid- a compound that forms H+ ions in a solution
Base- a compound that produces OH- ions in a solution
Buffers- are weakened acids or bases that can react with strong acids or bases to prevent sudden changes in pH

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