Investigative Science MIDTERM REVIEW Wednesday March 1, 2017 Perry High School Notebook page: 40 MR. POMERANTZ Page 1 of 6 Multiple choice and short

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1 MR. POMERANTZ Page 1 of 6 Multiple choice and short answer: provide the best answer to each question 1) What is an element a. A compound of two or more elements b. A molecule c. A substance consisting of atoms containing all of the same protons d. Two electrons 2) What is the center part of an atom called? a. Energy levels b. Nucleus c. Orbitals d. Shells 3) What are the rows of the periodic table called? a. Periods b. Groups or families c. Compounds d. Tables 4) What are the columns of the periodic table called? a. Compounds b. Groups or families c. Periods d. Tables 5) What is true about the atomic number? a. Always equal to the number of protons in one atom of an element b. Always equal to the number of electrons in one atom of an element c. Always equal to the number of Neutrons and protons in one atom of an element (P + N) d. A and B 6) What is true about the atomic mass? a. Always equal to the number of protons in one atom of an element b. Always equal to the number of electrons in one atom of an element c. Always equal to the number of Neutrons and protons in one atom of an element (P + N) d. A and B 7) What is true about an electron? a. Located in the nucleus b. Mass of 1 amu c. Has a negative charge 8) Which of the following is true? a. A proton has an atomic mass of 1 amu b. The charge of an electron is negative c. The charge of a neutron is neutral d. All of the above Look at your periodic table: 9) What element has 15 protons? a. Neon b. Argon c. Phosphorus d. Oxygen 10) How many electrons are there in a neutral atom of Yitrium? a. 39 b. 89 c. 50 d ) What is an isotope? a. A version of an atom of the same element with different number of neutrons. b. atoms or groups of atoms with a positive or negative charge c. A version of an atom of the same element with different number of protons. d. atoms or groups of atoms with a neutral charge

2 MR. POMERANTZ Page 2 of 6 12) What is the difference between a cation and an anion? a. A cation has a positive charge an anion has a negative charge b. A anion has a positive charge an cation has a negative charge c. A anion has more protons than electrons and a cation has more electrons than protons 13) What is the correct isotope notation for an element that has 84 protons 126 neutrons and 81 electrons? a. 14) What is true about the element in the chart above? a. Atomic number of 11 b. It has an atomic mass of 21 c. It has 12 electrons 15) What is true about the element in the chart above? a. The correct element symbol is Ne b. It has 12 neutrons c. The atom is an cation d. All are true 16) What is true about the element in the chart about? a. It has 12 electrons b. The atom is an cation c. It has 10 protons 17) What is the correct number of protons, neutrons and electrons for the element of with the following isotope notation? a. 26 protons 30 neutrons and 26 electrons b. 27 protons 30 neutrons and 17 electrons c. 26 protons 31 neutrons and 28 electrons d. 27 protons 31 neutrons and 28 electrons 18) What is the name of Be +1? a. Beryllium ion b. Beryllium c. Beryllium -1 d. Beryllium (I) ion 19) What is the name of Cl -1 a. Chlorine ion b. Chloride c. Chlorine -1 d. Chlorine (I) ion 20) What is the symbol of a manganese (II) ion? a. Mn -1 b. Mn -2 c. Mn +2 d. Mn +1 21) What is true about the periods of the periodic table? a. The periods are the rows b. The periods are the columns c. All elements in the same periods have the same number of valance electrons

3 MR. POMERANTZ Page 3 of 6 22) What is true about the groups of the periodic table? a. The groups are the columns b. The groups are the rows c. All elements of the groups have the same number of valance electrons 23) Which of the following element(s) has the same number of electron shells (also called energy levels) as Krypton? a. The element with the atomic number of 10 b. The element with 35 protons c. Any element in period 4 24) What are Valance electrons? a. The number of electrons in the nucleus b. The number of protons in the inner most energy level c. The number of electrons in the outermost energy level d. none of the above 25) Which of the following elements have the same number of valance electrons as fluorine? a. The element with 8 protons b. All elements with 7 valance electrons c. All elements in period 1 d. A and B 26) Which of the follow are the correct Lewis Dot structure for the element? a. 27) Which of the following are correct Bohr models for the element given? a. d. A and B are correct 28) Which of the following is true about the element in group 2 and period 3? a. It s correct Bohr model is b. It has the same number of valance electrons as Barium c. It has the same number of energy shells as Argon d. All are true 29) Which of the following is/are true? a. Metals form cations b. Metals form anions c. Metal ions have a positive charge 30) What do the Roman numerals represent in a compound name? {for example Titanium (III)} a. The charge of the transition metal b. The charge of the Nobel gases c. The charge of the non-metal 31) What is true about the charge of a metal ion? a. It is positive b. It is negative c. It is neutral

4 MR. POMERANTZ Page 4 of 6 32) What is true about the charge of an anion? a. It is positive b. It is negative c. Its neutral 33) What is true about a Bromine ion? a. It is written Br +1 b. It is written Br -1 c. It is a anion 34) When naming ionic compounds where does the ide go? a. The end of the anion b. The end of the cation c. The end of the negatively charged ion 35) What is the name of NaCl? a. Sodium Chloride b. Chloride Sodium c. Sodide Chlorine d. Sodide Chloride 36) What is the correct name of CaCl 2 a. Calcium Chlorine b. Chloride Calcium c. Chlorine Calcide d. Calcium Chloride 37) What is the correct name for Sr 3N 2 a. Sulfur Nitrate b. Strontium Nitride c. Strontium Nicklide d. Sulfur Nitride 38) What is the correct chemical formula for Magnesium Phosphide? a. Mg 2P 3 b. MgP c. MgP 2 d. Mg 3P 2 39) What is the correct chemical formula for Beryllium Oxide a. BeO b. Be 2O c. Be 2O 2 d. O 2Be 2 40) What is the correct chemical formula for Lead (IV) Bromide? a. PbBr 4 b. PbBr 2 c. Pb 2Br 2 d. Pb 2Br

5 MR. POMERANTZ Page 5 of 6 Short Answer: Provide an accurate answer to each question Table 1: pre and post reaction mass of solid compound X with liquid Y Trial # Pre reaction mass Post reaction mass Trial g g Trial g g Trial g g Trial g g 1. The data in table 1 (above) was collected when the solid compound X was mixed with the liquid Y. Upon mixing a gas was created, heat was let off and Liquid Y changed color from red to clear. What best describes the type of reaction occurring when X and Y mix? 2. Use the data in table 1 to determine which trial most likely took place in an open system. 3. What relationship does table 1 show about the temperature of compound X and the post reaction mass of compound X mixing liquid Y? 4. Explain the meaning of a closed system in reference to a chemical reaction. 5. How did the plastic bag in the baggie lab ensure a closed system? 6. Balance the following equation: C 6H 12O 6 + O 2 H 2O + CO 2 7. Balance the following equation: KBr + Fe(OH) 3 KOH + FeBr 3 8. List three signs of a chemical change. 9. Identify the equation or equations that are improperly balanced. I. 3KOH + Co 3(PO 4) 2 K 3PO 4 + Co(OH) 2 II. 2Cr(NO 2) 2 + (NH 4) 2SO 4 CrSO 4 + NH 4NO 2 III. Cr(NO 2) 2 + (NH 4) 2SO 4 CrSO 4 + 2NH 4NO Why can subscripts never change when balancing equations? 11. Scientific notation uses what base value 12. Expand the following numbers from scientific notation to standard format. 2.25x10-5, 2.25x10 5, 7.25x10 5, 2.25x Write the value 602,200,000,000,000,000,000,000 in scientific notation. 14. Use dimensional analysis to solve the following problem: The size of a grain of salt is 5x10-4 m. How many grains of salt will have to be stacked on top of each other to equal the height of an average human at 1.7x10 0 m? 15. Earth, Mars and Venus have respective diameters in meters of 1.27x10 4, 6.79x10 3 and 1.21x10 4. Which planet is the largest? 16. Jupiter is roughly 1000 times larger one of its many moons. Jupiter s diameter is 1.43E5, what is the diameter of the moon? 17. Expansion of the universe took less than 1 second. In scientific notation this is represented with what type of exponent? x10-2 m x 4.0x10-2 m represent the dimensions of a computer chip in meters. What is the area of the computer chip? 19. The sun has a diameter of 1,391,400 km. Scaled by the factor 1m per 1,000,000 km equates to 20. The sun has a diameter of 1,391,400 km. Scaled by the factor 1m per 1,000 km equates to

6 MR. POMERANTZ Page 6 of Contrast and explain the reactivity of the elements in group 17 with the reactivity of the elements in group What is the difference between transition metals and metalloids? 23. How does a period differ from a group on the periodic table? 24. Diagram the structure (protons, neutrons and electrons) of a carbon atom. 25. What is the atomic number of an atom with 26 protons? 26. An atom has a mass of 55 and an atomic number of 25. How many neutrons does the atom have? 27. How many electrons does the element Lithium (Li) have? 28. Is sodium (Na) an electron donor and an electron acceptor? Explain the answer. 29. How does the conductivity of transition mental and post-transition metal compare? 30. Metals have what common properties? 31. Diagram the formation of an ionic compound forming between lithium (Li) and fluorine (F). 32. Diagram the formation of an ionic compound forming between beryllium (Be) and sulfur (S). 33. Diagram the formation of an ionic compound forming between Calcium (Ca) and Phosphorus (P). 34. Show the correct Lewis Dot Structure of HCN 35. Show the correct Lewis Dot Structure for CH Show the correct Lewis Dot Structure for hydrogen peroxide, H 2CO 37. Show the correct Lewis Dot Structure for CH 3CO What element is glass made of? 39. What is the difference between Carbon and its isotope, Carbon 14? 40. Ionic compounds are always made of one and one.