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Periodic Table - Test 4


1. The elements in the periodic table are in the order of increasing:

    A. atomic weight
    B. atomic number
    C. neutron number
    D. mass number


2. The last two electrons in calcium (element 20) are in a:

    A. 2s orbital
    B. 3s orbital
    C. 4s orbital
    D. 3p orbital


3. The gas which differs in molecular composition from that of all of the others listed below is:

    A. hydrogen
    B. nitrogen
    C. neon
    D. chlorine


4. The smallest particle of an element that can enter into combination with other elements is:

    A. an atom
    B. a crystal
    C. a solid
    D. a molecule


5. Both positive and negative valence may be exhibited by:

    A. hydrogen
    B. chlorine
    C. neon
    D. carbon


6. Silicon carbide:

    A. contains oxygen
    B. is used as a lubricant
    C. is a conductor of electricity
    D. is made by the action of coke on silica


7. In its chemical action with other elements, sulfur most closely resembles:

    A. oxygen
    B. phosphorus
    C. hydrogen
    D. carbon


8. Which of the following elements does not exist in diatomic form?

    A. argon
    B. oxygen
    C. fluorine
    D. nitrogen


9. A substance that cannot be decomposed by chemical means is:

    A. sugar
    B. air
    C. water
    D. mercury


10. Sodium and potassium:

    A. are reducing agents
    B. are oxidizing agents
    C. have complete outer rings
    D. form ions with a negative charge












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