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vocab chapter 6

chapter 6

TermDefinition
element occur naturally.. also cannot be broken down
nucleus center of an atom. contains neutrons and protons
compound a substance that is composed of atoms of two or different elements that are chimically combined
covalent bond when two atoms share electrons
molecule is a group of atoms held together by covalent bonds
ionic bond the attractive force between two ions of opposite charge
metabolism all the chemical reactions that occur within an organism
ion is a charged particle made of atoms
mixture a combination of substances in which the individual components retain their own properties
solution a mixture in which one or more substances are distributed evenly in another and will not settle out of solutions
ph a measure of how aidic or basic a soltion is
acid is any substance that forms hydrogen ions in water
base is any substance that forms hydroxide ions in water
polar molecule is a molecule with an unequal distribution of charge
hydrogen bond the attraction of opposite charges between hydrogen and oxygen forms a weak bond
diffusion is the net movement of particles from an area of higher concentration to an area of lower concentrtion
dynamic equlilbrium a condition in which there is continuous movement but no overall contration change
isomers compounds that have the same chemical formula but different three dimensional structures
polymer is a large molecule formed when many smaller molecules bond together
carbohydrate is a biomolecule composed of carbon, hydrogen, and oxygen with a ratio of about two hydrogen atoms and one oxygen atom for every carbon atom
protein is a large complex polymer composed of carbon, hydrogen, oxygen, nitrogen and sometimes sulfer
amino acids the basic building blocks of proteins
peptide bond the covalent bond formed between the amino acids
enzyme is a protein that changes the rate of a chemical reaction
nucleic acids a complex biomolecule that stores cellular information in the form of a code
nucleotides nucleic acids are polymers made of smaller subunits
Created by: brittany514
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