1. The atomic number of an element is always the same as A) the sum of the protons and electrons. B) the average mass of the element’s isotopes. C) the.

1. The atomic number of an element is always the same as A) the sum of the protons and electrons. B) the average mass of the element’s isotopes. C) the number of neutrons. D) the number of protons.

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2. Which of the following is the false statement about carbon-12 and carbon-13. A) They are isotopes of carbon. B) They have the same number of neutrons. C) Their atoms have different masses. D) They have the same number of protons.

3. How are atoms in ground state different from atoms in an excited state? A) An atom in the excited state is stable and has more energy than an atom in ground state. B) An atom in ground state is stable and has less energy than an atom in the excited state. C) An atom in ground state is less stable and has more energy than an atom in the excited state. D) There is no difference between atoms in ground state and atoms in the excited state.

4. A substance that contains two or more elements joined in a fixed proportion is A) an element. B) a solution. C) a compound. D) a mixture.

5. How are the different types of mixtures classified? A) by the number of the particles B) by the color of the particles C) by the size of the particles

6. A subatomic particle that has a negative charge and is located outside the nucleus is A) a neutron B) an isotope. C) a proton. D) an electron.

7. How is 0.545 written in scientific notation? A) 545 x 10 -3 B) 5.45 x 10 1 C) 5.45 x 10 -1 D) 545 x 10 3

8. What are 5 meters equal to? A) 500 millimeters B) 500 centimeters C) 500 kilometers D) 500 decimeters

9. Which list contains only metals? A) silver, copper, hydrogen B) sodium, fluorine, cesium C) nitrogen, iodine, carbon D) gold, sodium, magnesium

10.On the Celsius scale, at what temperature does water freeze? A) 0° B) 100° C) 10° D) 1000°

11. If an element is either a gas or a brittle solid that does not conduct electricity, it is a A) a metalloid. B) a metal. C) nonmetal. D) a transition metal.

12. Which group contains the most reactive nonmetals? A) noble gases B) halogens C) alkaline earth metals D) the carbon family

13. Compared with Group 5A elements, Group 2A elements have A) more valence electrons. B) more isotopes. C) fewer valence electrons. D) more metalloids.

14. Which of the following is a false statement. A) The particles of a solution are the smallest of heterogeneous mixtures. B) The particles of a suspension settle out over time. C) The particles of a colloid settle out over time. D) The size of the particles of a colloid are between the size of those found in solutions and suspensions.

15. What is the most reactive halogen? A) iodine B) fluorine C) francium D) lithium

16. Sand is an example of a A) compound. B) homogeneous mixture. C) solution. D) heterogeneous mixture.

17. The symbol for silver is A) Ag B) AG C) ag

18. A carbon isotope has 6 protons, 6 electrons, and 8 neutrons. Its mass number is A) 8. B) 16. C) 14. D) 20.

19. Which of the following is an example of a homogeneous mixture? A) H 2 O B) NaOH solution C) gold D) a can of mixed nuts

20. According to the table, nitrogen would be a liquid at A) -215°C B) -194°C C) -196°C

21. All are physical properties except A) hardness. B) viscosity. C) density. D) reactivity.

22. A vertical column on the periodic table is a A) period. B) group.

23. Which of the following is not evidence that a chemical change may have occurred? A) formation of a precipitate B) change of shape C) formation of a gas D) change of color

A) glass. B) putty. C) iron. D) plastic. 24. A solid has a high melting point, is hard and malleable is most likely to be

25. A material’s resistance to flow is A) conductivity. B) viscosity. C) hardness. D)malleability.

26. Which of the following is not a true statement? A) A solid is a substance with a definite shape. B) A solid is a substance with a definite volume. C) The particles of a solid are packed tightly together. D) The particles of a solid are randomly arranged.

27. When two atoms of the same nonmetal combine, they often form A) a polar molecule. B) a diatomic molecule. C) a polyatomic ion. D) an ionic bond.

28. Chlorine forms a binary ionic compound with magnesium. What is the name of this compound? A) chlorine magnesium B) magnesium chloride C) magnesium chlorine D) chlorine magneside

29. Which of the following statements is true? A) In an ionic bond, electrons are shared between a cation and an ion. B) In a covalent bond, electrons are shared between atoms of metals. C) In an ionic bond, electrons are transferred between a cation and an ion. D) In a metallic bond, there is an attraction between an anion and a shared pool of electrons.

30. What is the formula formed by magnesium ions, Mg +2 and sulfide ions, S 2- ? A) MgS 2 B) Mg 2 S C) Mg 2 S 2 D) MgS

31. The pressure of a gas will increase when the temperature is increased if the volume of the gas A) and number of particles are increased. B) is increased but the number of particles is constant. C) and the number of particles are constant. D) is constant but the number of particles is reduced.

32. Which of the following factors affects the pressure of an enclosed gas? A) number of particles B) pressure C) temperature D) All of the above.

33.Which of the following statements is false regarding the missing phase changes in the diagram? A) A is vaporization and is exothermic. B) B is melting and is endothermic. C) C is freezing and is exothermic.

34. In the name nitrogen trifluoride, the prefix of the second word indicates that this molecule contains A) a polyatomic ion. B) three nitrogen atoms C) three fluorine atoms. D) an ionic bond.

35. The temperature of a 70 ml container of gas is 15°C. If the volume of the container increases to 140 ml, what does the temperature become? A) 60°C B) 30°C C) 6.4°C D) 7.5°C T 2 =

36. All of the following are exothermic phase changes except A) freezing. B) sublimation. C) deposition. D) condensation.

37. The phase change in which a solid goes directly to a gas without turning into a liquid first is A) deposition. B) condensation. C) sublimation D) vaporization.

38. The amount of energy needed to change a solid to a liquid is A) heat of vaporization. B) heat of fusion.

39. During a phase change, the temperature of a substance A) increases. B) remains the same. C) decreases. D) doubles.

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1. The atomic number of an element is always the same as A) the sum of the protons and electrons. B) the average mass of the element’s isotopes. C) the.

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Presentation on theme: "1. The atomic number of an element is always the same as A) the sum of the protons and electrons. B) the average mass of the element’s isotopes. C) the."— Presentation transcript:

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