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Unit 2 Vocabulary

Atoms Smallest particle of an element,that contains the chemical characteristics of that element.
Subatomic Particles Neutron, Proton, and Electron
Element Simplest type of matter with unique chemical properties.
Atomic Number Equal to the number of protons in each atom.
Mass Number The total number of protons and neutrons in a nucleus.
Isotopes Two or more atoms with the same atomic number, but contain a different number of neutrons.
Energy Levels The fixed amount of energy that a system such as a molecule, atom, electron, or nucleus, can have.
Chemical Bonds Occurs when the outermost electrons are transferred or shared between atoms.
Anions A negatively charged ion.
Cations A positively charged ion.
Kinetic Energy Energy that a body possesses when in motion.
Potential Energy The energy possessed by a body based on position, stresses within itself, electric charge, and other factors. NO MOTION.
Catabolism The breakdown of complex molecules in living organisms to form simpler ones, together with the release of energy; destructive metabolism.
Anabolism The synthesis of complex molecules in living organisms from simpler ones together with the storage of energy; constructive metabolism.
Decomposition Basically breaks or dissolves something. AB - A+B
Synthesis Basically makes something. A+B - AB
pH Scale The concentration of hydrogen ions.
Amino Acids A simple organic compound; the monomer for Proteins.
Polypeptides A polymer of amino acids joined together by peptide bonds.
Steroids Organic compounds with a molecular structure of four rings of carbon atoms.
Peptide Bonds The bonds that join amino acids together to form polypeptides.
Nucleotides A compound consisting of a nucleoside linked to a phosphate group; the monomer for Nucleic Acid.
ATP and ADP ATP is the main source of energy for cellular reactions. Made of 3 phosphate. Use one phosphate and it turns to ADP. ADP is a 2 phosphate
Cytokinesis The cytoplasmic division of a cell at the end of mitosis or meiosis, creating two daughter cells.
Stem Cells an undifferentiated cell of a multicellular organism that is capable of giving rise to indefinitely more cells of the same type, and from which certain other kinds of cell arise by differentiation.
Created by: BrittD2015