Name: Section: Matter: Atoms and Properties Practice Test

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Name: Section: Matter: Atoms and Properties Practice Test Directions: For each of the questions or incomplete statements below, choose the best of the answer choices given and write your answer on

1 Name: Section: Matter: Atoms and Properties Practice Test Directions: For each of the questions or incomplete statements below, choose the best of the answer choices given and write your answer on the line. 1. What does the diagram below show about matter? a) Matter is made up of elements. b) Matter takes up space. c) Matter is a solid. d) Matter has mass. 2. Which is not an example of matter? a) water c) gold b) air d) sound 3. The amount of space an object occupies is called its a) volume. c) weight. b) mass. d) length. 4. Atoms in a molecule are joined together by a) chemical bonds b) magnetism c) electricity d) gravity 5. The circles in the closed jars shown below represent particles of matter. Which jar most likely contains a solid? a) jar 1 c) jar 3 b) jar 2 d) jar 4

2 6. In which state of matter are particles farthest apart and moving the fastest? a) solid b) liquid c) gas d) Bose-Einstein Condensate 7. When you pour water from a beaker into a flask, there is a change in the water s a) mass. c) shape. b) volume. d) density. 8. Which statement best describes why atoms are electrically neutral? a) Subatomic particles have no charge at all. b) The number of negative electrons equals the number of all positive protons. c) Atoms contain only neutrons which have no charge. d) Protons are in the nucleus, while electrons are outside the nucleus. 9. Condensation refers to a change in state from a a) solid to a liquid. b) liquid to a solid. c) liquid to a gas. d) gas to a liquid. 10. The temperature at which a substance melts is the same temperature at which it a) boils. b) freezes. c) condenses. d) evaporates. Refer to a Periodic Table of the Elements to answer questions Which of the following elements can be classified as a metal? a) O (oxygen) b) He (helium) c) Na (sodium) d) Cl (chlorine) 12. Which element would be a poor conductor of electricity? a) Fe (iron) b) Cu (copper) c) Au (gold) d) S (sulfur)

13. In which group of The Periodic Table would you place an element that has most or all of the following properties: solid; nonconductor of heat and electricity; forms a molecule with two hydrogen

3 13. In which group of The Periodic Table would you place an element that has most or all of the following properties: solid; nonconductor of heat and electricity; forms a molecule with two hydrogen atoms? a) group 1 c) group 16 b) group 2 d) group Which of the following materials is soluble in water? a) oil c) sand b) salt d) grease 15. Which of the following combinations would dissolve the fastest? a) sugar cubes in iced tea b) granulated sugar in iced tea c) sugar cubes in hot tea d) granulated sugar in hot tea 16. When dissolving salt in water, the salt is considered to be the a) solvent. c) mixture. b) solute. d) solution. Use the information below to answer questions 17 through 19. A student measures the mass and volume of four pieces of metal. The results are shown in the following table. 17. Which metal is the densest of the four pieces measured? a) metal A c) metal C b) metal B d) metal D 18. Which two pieces might be made of the same metal? a) A and B c) A and D b) B and C d) C and D 19. The density of a gram sample of metal A should be a) 5.0 g/cm 3. b) 10 g/cm 3. c) 50 g/cm 3. d) 100 g/cm 3.

Questions 20 and 21 refer to the diagram below, which shows the relative densities of some liquids and solids at room temperature. 20. Which liquid in the diagram is least dense?

4 Questions 20 and 21 refer to the diagram below, which shows the relative densities of some liquids and solids at room temperature. 20. Which liquid in the diagram is least dense? a) wood c) iron b) water d) mercury 21. Which solid in the diagram is most dense? a) wood c) iron b) water d) mercury 22. Which of the following processes could be used to separate a mixture of salt and water? a) burning the water b) evaporating the water c) filtering the salt d) using a magnet 23. Which is only a physical change? a) souring of milk b) burning of oil c) melting of ice d) rusting of iron 24. Which process involves a chemical change? a) photosynthesis b) boiling water c) freezing water d) melting ice 25. A chemical change always a) forms one or more new substances. b) absorbs heat. c) releases heat. d) absorbs electricity.

5 26. In making an omelet, which process involves a chemical change? a) melting butter b) chopping onions c) frying eggs d) adding salt 27. A chemist mixed sodium and chlorine, but no reaction took place. A probable explanation for this outcome is that a) the reaction only releases energy. b) the reaction only absorbs energy. c) these substances cannot react. d) energy must be added to start a reaction. 28. During a chemical change, energy is a) always released. b) always absorbed. c) either absorbed or released. d) neither absorbed or released. 29. When making iced tea, Aidan noticed that there was less ice after he mixed the ice with the hot tea. On observing this, Aidan remembered that melting is a a) chemical change in which energy is absorbed. b) chemical change in which energy is released. c) physical change in which energy is absorbed. d) physical change in which energy is released. 30. Hydrogen gas is produced in a chemical reaction between zinc and an acid. Which setup below would most likely have the fastest reaction? a) a zinc strip at 20 degrees Celsius (1) b) powdered zinc at 20 degrees Celsius (2) c) a zinc strip at 30 degrees Celsius (3) d) powdered zinc at 30 degrees Celsius (4)

6 31. Food cooks faster at a higher temperature. This is because as the temperature increases, the rate of chemical reaction usually a) increases. b) decreases. c) remains the same. d) Not enough information. 32. The diagram shows four samples of wood, each with a mass of one kilogram. Which sample would most likely burn the fastest? a) log c) toothpicks b) planks of wood d) sawdust 33. Which change would be the most difficult to reverse? a) melting ice cube, because it is a physical change b) dissolving sugar in water, because it is a chemical change c) burning a match, because it is a chemical change d) rusting an iron nail, because it is a physical change 34. George cracks open an egg and finds that it has a very bad smell. The egg has become rotten. This is best described as a) physical, because no new substance was formed. b) physical, because a new substance was formed. c) chemical, because no new substance was formed. d) chemical, because a new substance was formed. 35. A molecule of carbon dioxide (CO 2 ) is made of one atom of carbon and two atoms of oxygen. Carbon dioxide is best classified as a) an element because it is made of one type of atom. b) an element because it is made of two types of atoms. c) a compound because it is made of one type of atom. d) a compound because it is made of two types of atoms. 36. Which subatomic particles are found outside the nucleus of an atom? a) positively charged protons b) positively charged electrons c) negatively charged protons d) negatively charged electrons

7 37. The diagram below represents an atom of helium. Based on this diagram, which statement is true? a) The positively charged protons are found outside the nucleus. b) The positively charged protons are found inside the nucleus. c) The negatively charged protons are found outside the nucleus. d) The negatively charged protons are found inside the nucleus. 38. When 12 grams of carbon (C) react with exactly 32 grams of oxygen (O), carbon dioxide is formed. The mass of the carbon dioxide is a) greater than 55 grams. b) equal to 44 grams. c) less than 44 grams. d) not determinable. 39. Four grams of hydrogen react with oxygen from the air to form 36 grams of water. How many grams of oxygen were used? a) 9 b) 40 c) 16 d) 32

Law of Conservation of Matter / Mass - Matter is never created nor destroyed, BUT its form can change. Forms of matter : solid, liquid, gas.

Chemistry 101 Matter - Anything that takes up space and has mass. Law of Conservation of Matter / Mass - Matter is never created nor destroyed, BUT its form can change. Forms of matter : solid, liquid,