1) What is an acid? a) Any substance with a pH less than 7. b) Any substance with a pH more than 7. c) Any substance with a pH equal to 7. 2) If you fill a cup full of ice water completely, and the ice melts, was this a physical or chemical change? a) Physical Change b) Chemical Changing 3) What is the elemental symbol for Silver? a) Ag b) Fe c) Si d) F e) Au 4) Which of these elements is a noble gas? a) Neon b) Cobalt c) Hydrogen d) Iodine e) Oxygen 5) How many valence electrons does Oxygen have? a) 1 b) 2 c) 3 d) 4 e) 5 f) 6 6) What is the chemical formula for water? a) HO2 b) H2O c) H2O2 7) Which of these items is a metal? a) Hydrogen b) Carbon c) Oxygen d) Helium e) Nickel 8) What are the three most common states of matter? (select all that apply) a) solids b) liquids c) gases d) Polaroids 9) What is Avogadro's Number? a) 6.023x10^-23 b) 3x10^8 c) 6.023x10^23 10) What does an anion have more of? a) Protons b) Neutrons c) Electrons

Chemistry

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