Biology Vocabulary
Chemistry in Biology
Mr.Adoff/Mrs.Naples
Element-a substance which cannot be broken down into simpler
substances
Atom-the smallest particle in an element
Nucleus-the center of an atom
Proton-charged particle found inside the nucleus
Electron-charged particle found outside the nucleus
Neutron-particle found in the nucleus with no charge
Atomic number-number found above an element on the periodic
table
Atomic mass-the number found below an element on the periodic
table
Compound-a substance that is made of two or more different
elements bound together
Molecule-a group of atoms bound together by covalent bonds
Covalent bond-when two atoms share electrons
Polar bond-occurs when the electrons of a bond are not shared
equally
Nonpolar bond-occurs when the electrons of a bond are shared
equally
Ionic bond-when two elements of opposite charge combine
Ion-an atom that has acquired a positive or negative charge
Reactant-substances that undergo the reaction
Products-substances which are formed from a reaction
Subscripts-the number of atoms of each element in a molecule
Coefficient-the number before each chemical formula
pH-refers to the hydrogen ion(H+) verses hydroxideion(H-)
concentration in a solution
Acid-a substance that has more H+ ions and has a pH below 7
Base-a substance that has more OH- ions and has a pH above 7
Ionization-when a nonionic compound is converted into ions