1. In the border area between metals and nonmetals, you will find the alkali metals. These elements have some properties of both metals and nonmetals. Arsenic is classified as an alkali.

A. True B. False

2. How many dots does neon need in its electron dot diagram if it has an atomic number of 10?

A. eight dots B. five dots C. two dots

3. Which of the following symbols represents copper metal?

A. Co B. Cu C. C

4. Which statement best sums up the arrangement of subatomic particles?

A. Neutrons and protons are inside the nucleus; electrons surround the nucleus.

B. Neutrons and electrons are inside the nucleus; protons surround the nucleus.

C. Protons and electrons are inside the nucleus; neutrons surround the nucleus.

5. Particles with an electrical charge of 1 are electrons. Neutrons are neutral particles with no electrical charge. Protons are particles with an electrical charge of 1+.

A. True B. False

6. Metals are ductile. This allows them to be hammered or rolled into sheets.

A. True B. False

7. Which of the following describes the process of sublimation?

A. a solid changing directly to a gas without forming a liquid

B. a substance changing from solid to liquid at its melting point C. an increase in the size of a substance when the temperature is increased

8. The attraction of iron to a magnet is an example of a physical property.

A. True B. False

9. Mixtures and compound would be classified as different because

A. a compound must be made from two elements; a mixture can be made of many elements.

B. compounds are only made from one type of atom; mixtures can contain various types of atoms.

C. compounds must be made from a precise chemical combination of the atoms of two or more elements; mixtures may vary in composition.

10. Which of the following best explains why elements in the same column on the periodic table generally have similar chemical properties?

A. Elements in the same column have atoms that are approximately the same size.

B. Elements in the same column have the same number of neutrons.

C. Elements in the same column have atoms with the same number of outer

electrons.

11. Isotopes must have the same number of protons to make them the same element, but their electron numbers can vary, providing for differing masses.

A. True B. False

12. If you needed a good conductor of electricity, which element should you use?

A. silicon B. carbon C. copper

13. Which of the following would not always be considered an example of a chemical change?

A. A solid forms when two liquids are mixed. B. Bubbles form when two substances are mixed.

C. The substance changes from a solid to a liquid.

14. Which of the following is one of water's strange behaviors?

A. Water contracts as its temperature decreases.

B. Frozen water becomes more dense than liquid water. C. As it freezes, the water molecules line up, creating empty spaces in the

crystal structure of ice.

15. If the density of an object is greater than the density of the fluid in which it is placed, what will happen?

A. The object will sink. B. The object will float. C. density has nothing to do with buoyancy.

16. What is true of noble gases? A. They have 8 electrons in their outer energy level.

B. They are very reactive. C. They are in the first group of elements on the periodic table.

17. If you wanted a solid to dissolve faster in a liquid which of the following would not increase the rate of dissolving?

A. stirring the mixture B. breaking the solid into smaller pieces

C. using a smaller volume of liquid

18. Lithium, sodium, and potassium are all elements in Group 1 of the periodic table. What is something they all have in common?

A. They all have one electron in their outer energy level.

B. They are all nonmetals. C. They cannot react quickly with any other element.

19. A quark is a subatomic particle that A. is only found inside the electron. B. can only be detected after very high energy collisions between charged

particles and protons have taken place. C. is found in only four uniquely different varieties.

20. What is the chief difference between the modern model (view) of the atom and those of the early 20th century?

A. The modern view suggests that the atom is a solid mass.

B. The modern view describes the movement and boundary of electrons as a

cloud.

C. The modern view describes the movement of electrons as similar to that of

planets around the Sun.

21. Charles's law states that A. the volume of a gas increases with increasing temperature.

B. fluid velocity increases when the flow of a fluid is restricted. C. as volume is decreased, gas exerts increased pressure on the walls of its

container.

22. Which of the following is not a compound?

A. ocean water

B. carbon dioxide

C. sodium chloride

23. The energy required for a liquid at its boiling point to become a gas is called the

A. heat of vaporization.

B. heat of fusion. C. thermal energy.

24. Which of the following would best describe the main difference between physical properties and chemical properties?

A. Physical properties can be determined by observing the substance without changing it; chemical properties depend on the interaction of the substance with other chemicals.

B. Physical properties depend on the amount of substance present; chemical properties do not.

C. Physical properties cannot be predicted; chemical properties can be predicted before any measurement or observation.

25. Solutions, suspensions, and colloids all contain the same size particles.

A. True B. False

26. What type of element in the periodic table is the most common?

A. nonmetal

B. metal C. metalloid

27. What theory is used to explain the behavior of particles in gases?

A. potential theory B. kinetic theory C. vapor theory

28. The mass number of an atom is determined by

A. the sum of the protons and neutrons.

B. only the number of protons.

C. only the number of neutrons.

29. A colloid is best described by which of the following?

A. A colloid is made up of an exact combination of elements.

B. A colloid has particles that will not settle out upon standing and it will not

scatter visible light.

C. A colloid's particles will not settle out upon standing, but it will reflect or

scatter visible light.

30. Why is the atomic mass of the next element on a modern periodic table of elements not always greater than that of the previous element?

A. The mass of an element depends on the number of electrons, which can change randomly.

B. In today's periodic table the elements increase by one proton at a time, but the next element may have more than one more neutron, or even have fewer neutrons than the element before.

C. In today's periodic table the elements are arranged in order of the number of neutrons, so each successive element should have one more neutron than the element before it.

31. In his mid-1800s periodic table of the chemical elements, Mendeleev arranged the elements in a sequence by their atomic mass, and aligned the sequence based on

A. the proton number and chemical properties.

B. the chemical properties of the elements. C. the neutron number and chemical properties.

32. Diamonds and graphite are two examples of carbon ___________. They are the same element, but have different molecular structures.

A. allotropes B. isotopes C. semiconductors

33. In which state of matter do particles stay close together, yet can slide past each other?

A. liquid

B. gas C. plasma

34. The universe is mostly composed of

A. plasma. B. solids. C. gases.

35. Which of the following particles have an electrical charge of 1+ ?

A. neutrons

B. electrons

C. protons

36. The Tyndall effect is the name of the process used for separating substances by evaporating a liquid and recondensing its vapor.

A. True B. False

37. Pascal's Principle states that A. pressure applied to a fluid is transmitted throughout the fluid.

B. fluid velocity increases when the flow of a fluid is restricted. C. the buoyant force on an object is equal to the weight of the fluid displaced.

38. Which of the following is a homogeneous mixture?

A. chicken noodle soup

B. sand

C. air

39. If the atomic number of carbon is 6, which of the following combinations identifies two isotopes of carbon?

A. One atom has 6 protons and 6 neutrons; the other atom has 7 protons and 6 neutrons.

B. One atom has 6 protons and 7 neutrons; the other atom has 6 protons and 6 neutrons.

C. One atom has 8 protons and 6 neutrons; the other atom has 6 protons and 7 neutrons.

40. Milk is an example of a suspension.

A. True B. False

41. What is one example of an amorphous solid?

A. cotton candy B. water C. sugar

42. Metals have electrons that move freely in their outer levels. This allows metals to be

A. good conductors.

B. poor conductors.

C. malleable.

43. Which of the following is not true of an electron dot diagram?

A. Electrons are much larger than the dots in the diagrams.

B. The exact locations of electrons around a nucleus are not known.

C. It shows all the electrons in the outermost energy level.

44. A solution is a homogenous mixture containing a liquid in which visible particles will not settle.

A. True B. False

45. If you are searching for the very smallest particles, which mixture would you find them in?

A. colloids B. suspensions

C. solutions

46. If all the atoms in a substance have the same identities, they are representatives of a chemical

A. isotope. B. compound.

C. element.

47. Liquids do not A. have a definite shape.

B. have a definite volume. C. take the shape of their container.

48. The Tyndall effect is the scattering of light by particles and can be used to distinguish between

A. colloids and suspensions.

B. compounds and solutions.

C. colloids and solutions.

49. Magnetism is an example of

A. a physical property.

B. weathering. C. a chemical property.

50. The number of protons in an atom is equal to its atomic number.

A. True B. False