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) row to row.
D) group to group.
  • 2. Which of the following is a physical change?
A) dissolving salt in water
B) cooking an egg
C) rusting iron
D) burning wood into charcoal
  • 3. In a compound, chemical energy is contained in the
A) bonds.
B) bonds.
C) movement of the electrons.
D) nuclei of the atoms.
  • 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 oxygen
D) one atom of chlorine
  • 5. Which of the following is NOT a property of an acid?
A) feels slipperychanges the color of an indicator
B) changes the color of an indicator
C) usually reacts with a metal
D) tastes sour
  • 6. Technology can best be defined as
A) the use of lenses and microscopes.
B) new inventions.
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) protons and neutrons
C) neutrons
D) protons
  • 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) condensation
B) evaporation
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) formation of a precipitate
B) production of a gas
C) change in color
D) change in shape
  • 12. According to Bohr’s model of the atom, electrons behave like
A) planets orbiting the sun.
B) was a vibrating string.
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) beta decay
C) gamma 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) physical change.
B) chemical change
  • 18. Maria is 123 centimeters tall. Her height meters is
A) 12.3 m.
B) 1.23 m.
C) 0.123 m.
  • 19. During a phase change, such as freezing or boiling, the temperature of a substance
A) decreases
B) increases
C) does not change
  • 20. Which statement about the alkali metals is correct?
A) The are located in the left-most column of the periodic table in group I.
B) They are usually gases.
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) gold.
B) water.
C) table salt.
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 left-most side
B) in the bottom rows
C) on the right side
  • 25. Which state of matter has a definite volume, but not shape?
A) liquid
B) solid
C) gas
  • 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) electric currents
B) physical bonds
C) chemical bonds
  • 28. Which of the following phase changes is an exothermic change? ( Exothermic means heat is removed)
A) melting
B) freezing
C) boiling
  • 29. Which of the following is a chemical change?
A) water boiling
B) ice being carved
C) water breaking down into hydrogen and oxygen
  • 30. Which state of matter will hold its shape without a container?
A) gas
B) solid
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 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) protons plus the number of neutrons.
C) electrons plus the number of neutrons
  • 33. A series of logical steps that is followed in order to solve a problem is called the
A) hypothesis
B) conclusion
C) scientific method.
  • 34. The SI unit for measuring temperature is the
A) ampere.
B) mole.
C) Kelvin.
  • 35. Which list of elements contains only metals?
A) oxygen (O) and calcium (Ca)
B) helium (He) and copper (Cu)
C) iron (Fe) and potassium (K)
  • 36. In which sample of water will a spoon full of salt dissolve fastest?
A) hot water
B) cold water
C) warm water
  • 37. Matter is defined as anything that
A) can be weighted.
B) has mass and takes up space.
C) can be seen and touched.
  • 38. What is the most important safety rule?
A) Never do experiments that involve flames or hot objects.
B) Always follow your teacher’s instructions and textbook directions exactly.
C) Never work with chemicals.
  • 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) pressure.
B) energy.
C) viscosity.
  • 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) water
B) oxygen
C) carbon dioxide
D) milk
  • 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) formulating questions.
C) doing experiments.
  • 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 electrons between metals and nonmetals.
B) sharing of electrons between two nonmetals.
C) transfer of neutrons between two metals.
  • 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) a total of eight neutrons and electrons.
C) eight protons in its nucleus
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