The Basics of Chemistry Version 8

 This is partner collaboration  On a separate piece of paper you will answer each question.  Upon viewing the answer, you will score yourself—1 point for a correct answer, 0 points for an incorrect answer  At the end their will be a prize for being smarter than an 8 th grader!

 Which of the following is an acid?  A) NaOH  B) HCl  C) NH 3  D) H 2 O  Answer:  B) HCl

 What are the pH values associated with acids and bases?  A) 0-8 Bases, 9-14 Acids  B) 0-6 Bases, 8-14 Acids  C) 0-6 Acids, 8-14 Bases  D) 0-8 Acids, 9-14 Bases  Answer: C)

 Why is water polar?  A) It has two sides of opposite charge, partial + and partial –  B) It has the ability to disassociate quickly  C) It has two sides of the same charge  D) It has a north and south  Answer: A)

 What does the Bohr Model for Carbon look like? (P= proton, N= neutron, E= electron)  A) 6P, 8N, 8E  B) 6P, 6N, 6E  C) 8P, 8N, 8E  D) 4P, 6N, 4E  Answer: B)

 What is the significance of the atomic number?  A) It tells you the # of protons & neutrons  B) It tells you the # of electrons & neutrons  C) It tells you the # of valence electrons  D) It tells you the # of protons & electrons  Answer: D)

 How do you calculate the # of neutrons?  A) same as the atomic #  B) same as the atomic mass  C) atomic mass- atomic #  D) same as # of electrons  Answer: C)

 How was the paperclip able to float on top of the water?  A) Adhesion  B) Polarity  C) Freezing point  D) Surface Tension  Answer: D)

 What makes isotopes different?  A) they have extra neutrons  B) they have extra protons  C) they have extra electrons  D) they have extra neutrons & protons  Answer: A)

 How do ionic bonds differ from covalent bonds?  A) ionic bonds have shared electrons, covalent bonds have transferred electrons  B) ionic bonds can only involve 2 atoms, covalent bonds can have more than 2  C) ionic bonds have transferred electrons, covalent bonds have shared  D) they both have shared electrons

 What is the significance of valence electrons?  A) they show how atoms will react/bond  B) they show the group # that atom is in  C) they show the mass number  D) both A & B  Answer: D

 Draw a Bohr model of Neon.  Answer: to be drawn on board

 Draw an ionic bond between Na and Cl. Also showing the resulting ions.  Answer: to be drawn on the board

 Ice floats, what does this mean?  A) solid water is less dense than liquid water  B) solid water is more dense than liquid water  C) solid water has no hydrogen bonding  D) solid water has a low freezing point  Answer: A)

 A maritime climate is moderated primarily by which of the following properties of water?  A) water is the universal solvennt  B) water is cohesive and adhesive  C) water has a high heat capacity  D) water has a high surface tension  Answer: C

 Lemon juice has a pH of about 2. This means  A) it is neutral  B) it has a higher concentration of H+ ions than water  C) it has a lower concentration of H+ ions than water  D) It has a higher concentration of OH- ions than water  Answer= B

 Why do isotopes behave the same as normal atoms?  A) the have the same # of neutrons  B) they have the same # of electrons  C) they have the same # of protons  D) they have the same atomic mass  Answer= B (electrons determine how atoms behave/ bind)

 Which of the following is NOT something that you can do with radioactive isotopes?  A) detect damaged cells  B) kill cancerous cells  C) date decaying objects  D) all of the above can be done with radioactivity  Answer= D)

 Hydrogen has 3 isotopes: Hydrogen-1, Hydrogen- 2, and Hydrogen-3. What does Hydrogen-3 have as far as subatomic particles?  A) 1 proton, 2 neutrons  B) 3 protons, 3 neutrons  C) 2 protons, 1 neutron  D) 1 proton, 1 neutron  Answer= A), nuclide notation (isotope notation), includes the mass # as a part of the name; mass= # of protons + # of neutrons

 Which ions are associated with acids & bases?  A) H+ ions for bases, OH- ions for acids  B) H- ions for acids, OH+ ions for bases  C) H+ ions for acids, OH- ions for bases  D) H 2 + ions for acids, O 2- ions for bases  Answer= C)

 Complete this statement: horizontal rows are ____________ in the periodic table and vertical columns are ___________, which determine the # of ____________ _____________.  Answer: Horizontal rows are periods in the periodic table and vertical columns are groups, which determine the # of valence electrons.

 0-5 pointsStudy more!  6-10 pointsStill need to review  pointsAlmost there  16+You are smarter than an 8 th grader and pretty prepared for the quiz!