PS Exam Fall 15-16 (50)
  • 1. In a periodic table, a set of properties repeats from
A) group to group.
B) row to row.
C) element to element.
D) column to column.
  • 2. Which of the following is a physical change?
A) cooking an egg
B) dissolving salt in water
C) burning wood into charcoal
D) rusting iron
  • 3. In a compound, chemical energy is contained in the
A) nuclei of the atoms.
B) movement of the electrons.
C) bonds.
D) bonds.
  • 4. Each molecule of hydrochloric acid, HCl, contains one atom of hydrogen and
A) one atom of oxygen
B) two atoms of chlorine
C) one atom of chlorine
D) two atoms of oxygen
  • 5. Which of the following is NOT a property of an acid?
A) tastes sour
B) usually reacts with a metal
C) changes the color of an indicator
D) feels slipperychanges the color of an indicator
  • 6. Technology can best be defined as
A) the use of lenses and microscopes.
B) science that uses computers.
C) the use of knowledge to solve problems.
D) new inventions.
  • 7. Atoms of elements that are in the same group have the same number of
A) neutrons
B) protons
C) protons and neutrons
D) valence electrons
  • 8. Which of the following is an example of a safe laboratory procedure?
A) eating or drinking from laboratory glassware.
B) touching hot objects with your bare hands.
C) testing on odor by directly inhaling the vapor.
D) tying back long hair and loose clothing.
  • 9. The process of a liquid becoming a solid is called
A) evaporation
B) freezing
C) condensation
  • 10. An ionic bond is a bond that forms between
A) atoms with neutral charges
B) one atom’s nucleus and another atom’s electrons
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) production of a gas
C) change in shape
D) formation of a precipitate
  • 12. According to Bohr’s model of the atom, electrons behave like
A) was a vibrating string.
B) light energy in a vacuum.
C) planets orbiting the sun.
  • 13. A mixture that separates into different layers when you stop stirring it is
A) a solution.
B) a suspension.
C) a colloid.
  • 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) beta decay
B) gamma decay
C) alpha decay
  • 16. The order of elements in the periodic table is based on
A) the number of neutrons in the nucleus
B) the number of electrons in outermost energy level
C) the number of protons in the nucleus
  • 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) does not change
B) increases
C) decreases
  • 20. Which statement about the alkali metals is correct?
A) They are extremely nonreactive.
B) The are located in the left-most column of the periodic table in group I.
C) They are usually gases.
  • 21. The change of a substance from a solid directly to a gas is called
A) condensation
B) sublimation
C) melting
  • 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) gold.
D) hydrogen.
  • 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 right side
B) on the left-most side
C) in the bottom rows
  • 25. Which state of matter has a definite volume, but not shape?
A) gas
B) liquid
C) solid
  • 26. A heterogeneous mixture is a mixture that IS
A) not uniform throughout.(this means it IS NOT the same)
B) uniform throughout. ( this means it IS the same)
  • 27. The forces that hold different atoms or ions together are
A) chemical bonds
B) physical bonds
C) electric currents
  • 28. Which of the following phase changes is an exothermic change? ( Exothermic means heat is removed)
A) melting
B) boiling
C) freezing
  • 29. Which of the following is a chemical change?
A) ice being carved
B) water breaking down into hydrogen and oxygen
C) water boiling
  • 30. Which state of matter will hold its shape without a container?
A) solid
B) gas
C) liquid
  • 31. The noble gases located in group 18 on the periodic table are inert because
A) their outermost energy level is full with 4 electrons
B) their outermost energy level is full with 8 electrons
  • 32. An atom’s mass number equals the number of
A) electrons plus the number of neutrons
B) protons.
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) scientific method.
B) conclusion
C) hypothesis
  • 34. The SI unit for measuring temperature is the
A) Kelvin.
B) ampere.
C) mole.
  • 35. Which list of elements contains only metals?
A) oxygen (O) and calcium (Ca)
B) iron (Fe) and potassium (K)
C) helium (He) and copper (Cu)
  • 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) Never do experiments that involve flames or hot objects.
C) Always follow your teacher’s instructions and textbook directions exactly.
  • 39. In the name carbon dioxide, the prefix of the second word indicates that a molecule of carbon dioxide contains
A) two carbon atoms.
B) two oxygen 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) viscosity.
B) energy.
C) pressure.
  • 42. When ice melts to form water, energy
A) is absorbed
B) is created
C) is released
D) is destroyed
  • 43. Which of the following is NOT a pure substance?
A) milk
B) carbon dioxide
C) oxygen
D) water
  • 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) has been tested by many observations.
C) must still be tested by experiments.
  • 47. The formation of an ionic bond involves the
A) transfer of electrons between metals and nonmetals.
B) transfer of neutrons between two metals.
C) sharing of electrons between two 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 neutrons in its nucleus.
C) eight protons in its nucleus
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