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AP Bio: Unit 1

Vocab for Unit 1

TermDefinition
Element A pure substance made up of only one type of atom
Atom The smallest unit of an element, made up of protons, neutrons, and electrons
Proton A positively charged particle found in the nucleus (center) of an atom
Electron A negatively charged particle that orbits the nucleus of an atom
Molecule A group of two or more atoms bonded together
Solvent A substance that dissolves another substance, forming a solution. The solvent is the main liquid.
Solute A substance that is dissolved to form a solution.
Polar A molecule with a positive and negative end.
Nonpolar A molecule with an even distribution of charge.
Ion Atom or molecule with a positive or negative charge.
Covalent Bond Connection between two atoms formed when they share electrons.
pH A scale that measures how acidic or basic a solution is, ranging from 0 (acidic) to 14 (basic), with 7 being neutral.
Reactants The substances at the start of a chemical reaction.
Products The substances at the end of the chemical reaction.
Electronegativity The ability of an atom to attract electrons in a chemical bond. How much an atom wants electrons.
Isotope An atom of the same element with a different number of neutrons.
Created by: chianti
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