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24 Cards in this Set

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the smallest unit of matter that cannot be broken down by chemical means
Atom
a substance made of only one kind of atom
Element
a substance made of the joined atoms of two or more different elements
compound
a group of atoms held together by covalent bonds
Molecule
An atom or molecule that has gained or lost one or more electrons
Ion
an attraction between substances of the same kind
Cohesion
an attraction between different substances
Adhesion
a mixture in which one or more substances are evenly distributed in another substance
Solution
Compounds that form hydrogen ions when dissolved in water
Acids
Compounds that reduce the concentration of hydrogen ions in a solution
Bases
organic compounds made of carbon, hydrogen, and oxygen atoms in a proportion of 1:2:1
Carbohydrates
single sugars
Monosaccharide
non-polar molecules that is not soluble in water
lipid
a chain of molecules called amino acids linked together
Protein
the building blocks or proteins
Amino Acids
a long chain of similar molecules called nucleotides
Nucleic Acid
a molecule having three parts: a sugar, base and a phosphate group
Nucleotide
two strands of nucleotides that spiral around each other
DNA (deoxyribonucleic acid)
a single strand of nucleotides
RNA (ribonucleic acid)
a single nucleotide with two energy-storing phosphate groups
ATP
the ability to move or change matter
energy
the energy needed to start a chemical reaction
Activation energy
substances that increase the speed of chemical
Enzymes
a substance on which an enzyme acts during a chemical reaction
Substrate