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Unit Review Use this to review your understanding of the Unit. Click on either True or False or Multiple Choice. Click on the Home icon to get back to.

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Presentation on theme: "Unit Review Use this to review your understanding of the Unit. Click on either True or False or Multiple Choice. Click on the Home icon to get back to."— Presentation transcript:

1 Unit Review Use this to review your understanding of the Unit. Click on either True or False or Multiple Choice. Click on the Home icon to get back to this page. True or False Multiple Choice

2 In decomposition of hydrogen peroxide, the enzyme catalase found in the liver acts as a catalyst. TrueFalse

3 The formula for disulfur dichloride is: S 2 Cl 2 TrueFalse

4 The water that comes out of the tap in your kitchen is a pure substance. FalseTrue

5 In phosphorus pentachloride, the phosphorus atom is bonded covalently to five chlorine atoms. TrueFalse

6 The formula for potassium oxide is: P 4 O 10 FalseTrue

7 In losing 3 electrons, aluminum atom becomes aluminide ion FalseTrue

8 The chemical formula for lithium bromide will be: Li 2 Br FalseTrue

9 The formula for iodine heptafluoride is: IF 7 TrueFalse

10 Aluminum is very shiny. The above statement describe the “lustre” of aluminum. TrueFalse

11 According to the particle theory, in solids the particles are very closed together and are in random constant motion. TrueFalse

12 If an atom has 16 protons, 16 electrons and 17 neutrons, it is an isotope of the element Chlorine. FalseTrue

13 The Periodic Table of Elements arrange elements based on their atomic number. TrueFalse

14 In CaCl 2, the calcium atom is covalently bonded to 2 chlorine atoms FalseTrue

15 Blue gatorade drink is an example of mechanical mixture. FalseTrue

16 Silicon has an atomic mass of u. This means that the most common isotope of Silicon has 14 neutrons. TrueFalse

17 End of True or False Check your score HOME

18 In reaction with metals, non-metals tend to: A. Receive the metal’s outer orbit electrons and become negatively charged ions. C. Share the electrons located in their outer orbit B. Donate the electrons in their outer orbit and become negatively charged ions. D.Share the electrons located in their inner orbitsShare the electrons located in their inner orbits

19 Which of the following is NOT part of John Dalton’s theory of atom? A. Atoms contain negatively charged particles called electrons C. Atoms of an element are identical, but atoms of different elements are different B. All matter is made up of tiny, indivisible particles called atoms D.Atoms can be rearranged, but never created or destroyedAtoms can be rearranged, but never created or destroyed

20 Which of the following is NOT TRUE? C.All Group 14 elements have 14 valence electronsAll Group 14 elements have 14 valence electrons B.All Group 17 elements have 7 valence electronsAll Group 17 elements have 7 valence electrons A.All Group 2 elements have 2 valence electronsAll Group 2 elements have 2 valence electrons D.All Group 1 elements have 1 valence electronAll Group 1 elements have 1 valence electron

21 Discover the neutron component of an atom: A. Chadwick C. Rutherford B. Bohr D.DaltonDalton

22 Which of the following statements is TRUE? B. The atomic mass can be used to find out the number of neutrons that an element has. C. The number of electrons of a neutral atom will be greater than the number of protons.. A. The atomic number indicates the number of protons and neutrons of an element. D.None of the aboveNone of the above

23 Carbon – 14 is an isotope of carbon. It has: B. 6 protons and 8 neutrons C. 8 protons and 6 neutrons A. 7 protons and 7 neutrons D.6 protons and 6 neutrons6 protons and 6 neutrons

24 Solid blocks of four pure substances are placed in water as shown. What can be said about the density of the substances? B. Density of substance 2 is less than density of water C. Densities of substances 1, 3 and 4 are less than density of water A. They have the same density D.The density of substance 2 is greater than the othersThe density of substance 2 is greater than the others

25 Which is NOT a characteristic physical property? B. Mass C. Boiling point A. Density D.Melting pointMelting point

26 In Bohr-Ruther Diagram: B. The first orbit can hold a maximum of 2 electrons C. The neutrons are drawn orbiting the nucleus A. All orbits can hold a maximum of 8 electrons D.None of the above is trueNone of the above is true

27 A 20.0 g sample of wood has a density of 0.50 g/cm 3. What is the volume of the sample? B. 40 cm 3 C. 10 cm 3 A. 20 cm 3 D.25 cm 325 cm 3

28 Cubes A and B are uniform throughout and come into perfect balance on a scale shown below. How do the densities of the two objects compare? C.Object A has greater densityObject A has greater density B.There is not enough information to tellThere is not enough information to tell A.The objects have the same densityThe objects have the same density D.Object B has greater densityObject B has greater density

29 An alloy is an example of a: A. Solution C. Pure substance B. Mechanical mixture D.None of the aboveNone of the above

30 The least reactive group of elements: D. Noble gases B.Alkaline Earth metalsAlkaline Earth metals A.Alkali metalsAlkali metals C. Halogens

31 The correct name for compound KF is: C.Potassium fluoridePotassium fluoride B.Potasside fluorinePotasside fluorine A.Potassium fluorinePotassium fluorine D.Potasside fluoridePotasside fluoride

32 Which of the following is NOT TRUE for Alkaline Earth Metals? C.Can be found as solids, liquids or gasCan be found as solids, liquids or gas B.Burn with bright, colourful flamesBurn with bright, colourful flames A.Shiny and silveryShiny and silvery D.More reactive as you move down the periodic tableMore reactive as you move down the periodic table

33 Which of the following represents a physical change? D. All of the above B.Cutting a piece of wood into twoCutting a piece of wood into two A.Dissolving salt into waterDissolving salt into water C. A cube of ice melting at room temperature

34 The Bohr-Rutherford diagram of Magnesium suggests that in ionic compounds, Magnesium will have an ionic charge of: C.+2+2 B.-2-2 A.00 D.-1

35 To find out whether a mystery white powder is made up of salt or cornstarch, you can do the following test: C.Add iodine solution and see if the powder turns blue-black in colourAdd iodine solution and see if the powder turns blue-black in colour B.Add iodine solution and see if the powder turns red in colourAdd iodine solution and see if the powder turns red in colour A.Dissolve them in water. Only salt will dissolve in water.Dissolve them in water. Only salt will dissolve in water. D.None of the aboveNone of the above

36 In doing a gas test you insert a glowing splint into the tube. You then see splint re-lighted. The gas produced is: C.Oxygen gasOxygen gas B.Carbon dioxideCarbon dioxide A.Hydrogen gasHydrogen gas D.Water vapourWater vapour

37 All group 15 elements: B. Have 5 valence electrons C. Are metals A. Have 15 valence electrons D.Will lose 3 valence electrons when forming ionic compoundsWill lose 3 valence electrons when forming ionic compounds

38 In forming ionic compound between Magnesium and Chlorine, the composition will be: D. 1 Magnesium bonded to 2 Chlorine B.1 Magnesium bonded to 1 Chlorine1 Magnesium bonded to 1 Chlorine A.2 Magnesium bonded to 2 chlorine2 Magnesium bonded to 2 chlorine C. 2 Magnesium bonded to 1 Chlorine

39 The picture shown represents: A. A moleculeC. Various ions B. An ionic compoundD.An elementAn element

40 Alkali metals are: D. All of the above B.Relatively low densities, can float on waterRelatively low densities, can float on water A.Shiny, silvery and softShiny, silvery and soft C. Highly reactive

41 In a block of ice, the molecules are: A. Vibrating back and forth, but remaining more or less in one location C. Completely motionless B. Freely sliding past one another, but remaining close together D.Extremely disorganized with no recognizable pattern to their locationsExtremely disorganized with no recognizable pattern to their locations

42 Congratulations! You have reached the end of the review. Score HOME


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