1. The three particles that make up atoms are?
  2. The space surrounding the nucleus of an atom contains?
  3. Each element unique and different from other elements because of the number of ?
  4. How does one refer to an atomic form of an element containing the same number of protons but different number of neutrons?
  5. Oxygen has an atomic number of 8. Therefore, it must have ???protons and??? electrons.
  6. Which four elements make up approximately 96% of living matter?
  7. Covalent bond is formed as the result of?
  8. A chlorine atom becomes a chloride ion when it?
  9. What type of bond holds the compound table salt together?
  10. What type of electron is available to form bonds?
  11. Carbon-12, carbon-13, and carbon-14 are?
  12. The partial negative charge at one end of a water molecule is attracted to the partial positive charge of another water molecule. What is this attraction called?
  13. What type of ions are formed when atoms loses electrons?
  14. An atom of fluorine has nine electrons. How many valence electrons does it have?
  15. A substance with a pH of 6 is called?
  16. Solutions that contain concentrations of H+ ions lower than pure water is called?
  17. What do cohesion, surface tension, and adhesion have in common with reference to water?
  18. Which of the following solutions has the greatest concentration of hydrogen ions [H+]?
    1. Gastric juice at pH 2
    2. Black coffee at pH 5
    3. Tomato juice at pH 4
    4. Household bleach at pH 12
    5. Vinegar at pH 3
19. Which of the following solutions has the greatest concentration of hydroxide ions [OH-]?
a. Vinegar at pH 3
b. Tomato juice at pH 4
c. Seawater at pH 8
d. Urine at pH 6
e. Lemon juice at pH
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