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Biology Chapter 2

TermDefinition
element one particular type of atom, it cannot be broken down into a simpler substance by ordinary chemical means
atom smallest basic unit of matter
compound a substance made of atoms of different elements bonded together in a certain ratio
ion an atom that has gained or lost one or more electrons
ionic bond forms through the electrical force between oppositely charged ions
covalent bonds forms when atoms share a pair of electrons
molecule two or more atoms held together by covalent bonds
hydrogen bond an attraction between a slightly positively charged hydrogen atom and a slightly negatively charged hydrogen atom
cohesion the attraction among molecules of a substance
adhesion the attraction among molecules of different substances
solution a mixture of substances that is the same throughout- it is a homogenous mixture
solute a substance that dissolves in a solvent
solvent the substance that is present in the greater amount and that dissolves in another substance
monomer each subunit in the complete molecule
polymer a large molecule, or a macromolecule, made of many monomers bonded together
carbohydrates molecules composed of carbon, hydrogen, and oxygen, and they include sugars and starches
lipids nonpolar molecules that include fats, oils, and cholesterol
protein a polymer made of monomers called amino acids
amino acids molecules that contain carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur
nucleic acid polymers that are made up of the
Created by: StengerE21
 

 



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