PS Exam Fall 15-16 (50)
  • 1. In a periodic table, a set of properties repeats from
A) element to element.
B) column to column.
C) group to group.
D) row to row.
  • 2. Which of the following is a physical change?
A) burning wood into charcoal
B) rusting iron
C) dissolving salt in water
D) cooking an egg
  • 3. In a compound, chemical energy is contained in the
A) bonds.
B) bonds.
C) nuclei of the atoms.
D) movement of the electrons.
  • 4. Each molecule of hydrochloric acid, HCl, contains one atom of hydrogen and
A) two atoms of oxygen
B) two atoms of chlorine
C) one atom of chlorine
D) one atom of oxygen
  • 5. Which of the following is NOT a property of an acid?
A) tastes sour
B) usually reacts with a metal
C) feels slipperychanges the color of an indicator
D) changes the color of an indicator
  • 6. Technology can best be defined as
A) science that uses computers.
B) the use of knowledge to solve problems.
C) the use of lenses and microscopes.
D) new inventions.
  • 7. Atoms of elements that are in the same group have the same number of
A) protons and neutrons
B) protons
C) valence electrons
D) neutrons
  • 8. Which of the following is an example of a safe laboratory procedure?
A) tying back long hair and loose clothing.
B) touching hot objects with your bare hands.
C) eating or drinking from laboratory glassware.
D) testing on odor by directly inhaling the vapor.
  • 9. The process of a liquid becoming a solid is called
A) evaporation
B) condensation
C) freezing
  • 10. An ionic bond is a bond that forms between
A) one atom’s nucleus and another atom’s electrons
B) atoms with neutral charges
C) ions with opposite charges
  • 11. Which of the following is NOT a clue that a chemical change has occurred?
A) change in color
B) formation of a precipitate
C) production of a gas
D) change in shape
  • 12. According to Bohr’s model of the atom, electrons behave like
A) was a vibrating string.
B) planets orbiting the sun.
C) light energy in a vacuum.
  • 13. A mixture that separates into different layers when you stop stirring it is
A) a colloid.
B) a suspension.
C) a solution.
  • 14. The kinetic theory states that the higher the temperature, the faster the
A) bonds between atoms break down.
B) particles that make up a substance move.
  • 15. What type of nuclear decay releases energy but not a particle?
A) alpha decay
B) gamma decay
C) beta decay
  • 16. The order of elements in the periodic table is based on
A) the number of protons in the nucleus
B) the number of neutrons in the nucleus
C) the number of electrons in outermost energy level
  • 17. Digesting food is an example of
A) chemical change
B) physical change.
  • 18. Maria is 123 centimeters tall. Her height meters is
A) 1.23 m.
B) 12.3 m.
C) 0.123 m.
  • 19. During a phase change, such as freezing or boiling, the temperature of a substance
A) increases
B) does not change
C) decreases
  • 20. Which statement about the alkali metals is correct?
A) They are usually gases.
B) They are extremely nonreactive.
C) The are located in the left-most column of the periodic table in group I.
  • 21. The change of a substance from a solid directly to a gas is called
A) melting
B) sublimation
C) condensation
  • 22. A substance has a melting point of 0o C and a boiling point of 100o C. The substance is most likely
A) water.
B) table salt.
C) hydrogen.
D) gold.
  • 23. The name iron ( II ) indicates that a compound contains
A) iron ions with a + 2 charge
B) iron ions with a + 11 charge
  • 24. Carbon and other nonmetals are found in which area of the periodic table?
A) on the left-most side
B) on the right side
C) in the bottom rows
  • 25. Which state of matter has a definite volume, but not shape?
A) gas
B) solid
C) liquid
  • 26. A heterogeneous mixture is a mixture that IS
A) uniform throughout. ( this means it IS the same)
B) not uniform throughout.(this means it IS NOT the same)
  • 27. The forces that hold different atoms or ions together are
A) physical bonds
B) chemical bonds
C) electric currents
  • 28. Which of the following phase changes is an exothermic change? ( Exothermic means heat is removed)
A) boiling
B) freezing
C) melting
  • 29. Which of the following is a chemical change?
A) water breaking down into hydrogen and oxygen
B) water boiling
C) ice being carved
  • 30. Which state of matter will hold its shape without a container?
A) gas
B) liquid
C) solid
  • 31. The noble gases located in group 18 on the periodic table are inert because
A) their outermost energy level is full with 8 electrons
B) their outermost energy level is full with 4 electrons
  • 32. An atom’s mass number equals the number of
A) protons.
B) electrons plus the number of neutrons
C) protons plus the number of neutrons.
  • 33. A series of logical steps that is followed in order to solve a problem is called the
A) conclusion
B) scientific method.
C) hypothesis
  • 34. The SI unit for measuring temperature is the
A) ampere.
B) Kelvin.
C) mole.
  • 35. Which list of elements contains only metals?
A) iron (Fe) and potassium (K)
B) helium (He) and copper (Cu)
C) oxygen (O) and calcium (Ca)
  • 36. In which sample of water will a spoon full of salt dissolve fastest?
A) cold water
B) hot water
C) warm water
  • 37. Matter is defined as anything that
A) has mass and takes up space.
B) can be seen and touched.
C) can be weighted.
  • 38. What is the most important safety rule?
A) Never work with chemicals.
B) Always follow your teacher’s instructions and textbook directions exactly.
C) Never do experiments that involve flames or hot objects.
  • 39. In the name carbon dioxide, the prefix of the second word indicates that a molecule of carbon dioxide contains
A) two oxygen atoms.
B) two carbon atoms.
  • 40. The charge of an electron is
A) -1
B) +1
C) 0
  • 41. The resistance of a fluid to flow is referred to as
A) energy.
B) pressure.
C) viscosity.
  • 42. When ice melts to form water, energy
A) is absorbed
B) is destroyed
C) is released
D) is created
  • 43. Which of the following is NOT a pure substance?
A) oxygen
B) water
C) carbon dioxide
D) milk
  • 44. During nuclear fission, great amounts of energy are produced from
A) tremendous amounts of mass.
B) very small amounts of mass.
  • 45. Scientists test a hypothesis by
A) doing experiments.
B) formulating questions.
C) drawing conclusions.
  • 46. A scientific theory is an explanation that
A) that can never be changed.
B) must still be tested by experiments.
C) has been tested by many observations.
  • 47. The formation of an ionic bond involves the
A) sharing of electrons between two nonmetals.
B) transfer of neutrons between two metals.
C) transfer of electrons between metals and nonmetals.
  • 48. Scientists test a hypothesis by
A) designing models.
B) doing experiments.
C) drawing conclusions.
  • 49. Oxygen’s atomic number is 8. This means that an oxygen atom has
A) a total of eight neutrons and electrons.
B) eight protons in its nucleus
C) eight neutrons in its nucleus.
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