PS Exam Fall 15-16 (50)
  • 1. In a periodic table, a set of properties repeats from
A) column to column.
B) row to row.
C) element to element.
D) group to group.
  • 2. Which of the following is a physical change?
A) dissolving salt in water
B) rusting iron
C) cooking an egg
D) burning wood into charcoal
  • 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 chlorine
B) one atom of oxygen
C) two atoms of chlorine
D) two atoms of oxygen
  • 5. Which of the following is NOT a property of an acid?
A) tastes sour
B) feels slipperychanges the color of an indicator
C) changes the color of an indicator
D) usually reacts with a metal
  • 6. Technology can best be defined as
A) new inventions.
B) the use of lenses and microscopes.
C) science that uses computers.
D) the use of knowledge to solve problems.
  • 7. Atoms of elements that are in the same group have the same number of
A) valence electrons
B) neutrons
C) protons
D) protons and neutrons
  • 8. Which of the following is an example of a safe laboratory procedure?
A) testing on odor by directly inhaling the vapor.
B) tying back long hair and loose clothing.
C) eating or drinking from laboratory glassware.
D) touching hot objects with your bare hands.
  • 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) ions with opposite charges
C) atoms with neutral charges
  • 11. Which of the following is NOT a clue that a chemical change has occurred?
A) change in color
B) change in shape
C) production of a gas
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 suspension.
B) a solution.
C) a colloid.
  • 14. The kinetic theory states that the higher the temperature, the faster the
A) particles that make up a substance move.
B) bonds between atoms break down.
  • 15. What type of nuclear decay releases energy but not a particle?
A) beta decay
B) alpha decay
C) gamma decay
  • 16. The order of elements in the periodic table is based on
A) the number of electrons in outermost energy level
B) the number of neutrons in the nucleus
C) the number of protons in the nucleus
  • 17. Digesting food is an example of
A) physical change.
B) chemical 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) decreases
C) increases
  • 20. Which statement about the alkali metals is correct?
A) They are usually gases.
B) The are located in the left-most column of the periodic table in group I.
C) They are extremely nonreactive.
  • 21. The change of a substance from a solid directly to a gas is called
A) melting
B) condensation
C) sublimation
  • 22. A substance has a melting point of 0o C and a boiling point of 100o C. The substance is most likely
A) hydrogen.
B) water.
C) table salt.
D) gold.
  • 23. The name iron ( II ) indicates that a compound contains
A) iron ions with a + 11 charge
B) iron ions with a + 2 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) electric currents
C) physical bonds
  • 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) electrons plus the number of neutrons
B) protons plus the number of neutrons.
C) protons.
  • 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) mole.
C) ampere.
  • 35. Which list of elements contains only metals?
A) helium (He) and copper (Cu)
B) iron (Fe) and potassium (K)
C) oxygen (O) and calcium (Ca)
  • 36. In which sample of water will a spoon full of salt dissolve fastest?
A) warm water
B) cold water
C) hot water
  • 37. Matter is defined as anything that
A) can be seen and touched.
B) has mass and takes up space.
C) can be weighted.
  • 38. What is the most important safety rule?
A) Never do experiments that involve flames or hot objects.
B) Never work with chemicals.
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 oxygen atoms.
B) two carbon atoms.
  • 40. The charge of an electron is
A) 0
B) +1
C) -1
  • 41. The resistance of a fluid to flow is referred to as
A) pressure.
B) viscosity.
C) energy.
  • 42. When ice melts to form water, energy
A) is absorbed
B) is created
C) is destroyed
D) is released
  • 43. Which of the following is NOT a pure substance?
A) water
B) milk
C) oxygen
D) carbon dioxide
  • 44. During nuclear fission, great amounts of energy are produced from
A) very small amounts of mass.
B) tremendous amounts of mass.
  • 45. Scientists test a hypothesis by
A) drawing conclusions.
B) doing experiments.
C) formulating questions.
  • 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) transfer of neutrons between two metals.
B) transfer of electrons between metals and nonmetals.
C) sharing of electrons between two nonmetals.
  • 48. Scientists test a hypothesis by
A) doing experiments.
B) designing models.
C) drawing conclusions.
  • 49. Oxygen’s atomic number is 8. This means that an oxygen atom has
A) eight neutrons in its nucleus.
B) eight protons in its nucleus
C) a total of eight neutrons and electrons.
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