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Chemistry

QuestionAnswer
atom is the smallest unit of matter that cannot be broken down by chemical means
element a pure substance made of only one kind of atom
compound is a substance made of the joined atoms of two or more different elements
molecule a group of atoms held together by covalent bonds
hydrogen bonds a weak chemical attraction between polar molecules
ion an atom or molecule that has gained or lost one or more electrons
Cohesion is an attraction between substances of the same kind
Adhesion an attraction between different substances
solution a mixture in which one or more substances are evenly distributed in another substance
acids forms hydrogen ions when dissolved in water and has a pH below 7
base forms hydroxide ions when dissolved in water and has a pH above 8
carbohydrates organic compounds made of carbon
monosaccharide single sugar molecule and the building blocks of carbohydrates
disaccharide double sugar - two sugar molecules (monosaccharides) joined together
polysaccharide 3 or more sugar molecules (monosaccharides) joined together
lipids nonpolar molecules that are not soluble or mostly insoluble in water - fats-phospholipids-steroids and waxes
proteins large molecule formed by linked amino-acids
amino acids building blocks of proteins
nucleic acids long chain of smaller molecules called nucleotides
nucleotides has three parts - sugar- a base and a phosphate group
DNA consists of two strands of nucleotides or that spirals around each other - hereditary information
RNA consist of a single strand of nucleotides- involved in protein synthesis
ATP single nucleotide with 2 extra energy-storing phosphate groups
Created by: fepeagler
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