Chapter 2 Review Regular rules No notes no books Top Group gets 5 points extra credit 20 QUESTIONS

QUESTION 1 Basic unit of Matter ANSWER- Atom

QUESTION 2 What holds atoms in compounds together? ANSWER- Chemical Bond

QUESTION 3 True or false, Strong bases have a pH value ranging from 11 to 14 Answer- True

Question 4 Answer- Amino Acids Proteins are polymers of molecules called _________ _____ Answer- Amino Acids

Question 5 What is released or absorbed whenever chemical bonds form or are broken? Answer-Energy

Question 6 Compound that forms hydrogen ions in solution Answer – Acid

Question 7 Mixtures of water and nondissolved substances are known as ______________ Answer- Suspensions

Question 8 Answer- Adhesion __________- an attraction between molecules of different substances Answer- Adhesion

Question 9 Element or compound that enters into a chemical process Answer- reactants

Question 10 A water molecule is ______ because there is an uneven distribution of electrons between the oxygen and hydrogen atoms Answer- Polar

Question 11 Answer- Atomic Number The number of protons in the nucleus of an atom is called the __________ ___________ Answer- Atomic Number

Question 12 Negatively charged subatomic particle Answer- Electron

Question 13 Answer- pH Scale Chemists designed the _____ _______to indicate the concentration of H+ ions in a solution Answer- pH Scale

Question 14 Answer- Enzymes Proteins that act as biological catalysts are called _______ Answer- Enzymes

Question 15 Monomer of Proteins Answer- Amino Acid

Question 16 Answer- Element An __________ is a substance that cannot be broken down into simpler substances by chemical or physical means Answer- Element

Question 17 Answer- Substrates The reactants of enzyme-catalyzed reactions are known as _____________ Answer- Substrates

Question 18 Answer- Chemical Reaction A __________ __________ is a process that changes, or transforms one set of chemicals into another Answer- Chemical Reaction

QUESTION 19 Answer- Activation Energy Chemists call the energy needed to get a reaction started the ________ _________ Answer- Activation Energy

Question 20 (Last) Answer- Bonds Chemical reactions always involve changes in chemical ______ Answer- Bonds