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Periodic Table - Test 2


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

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


2. Sodium and potassium:

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


3. Compared with potassium, calcium:

    A. has larger atoms
    B. has a lower density
    C. is more easily oxidized
    D. is less active chemically


4. Glass:

    A. is a compound having a variable chemical formula
    B. is a mixture of salts resulting from oxides
    C. has a fixed melting point
    D. is made up of individual crystals


5. Which of the following is most important in predicting the chemical properties of a given element?

    A. the number of protons in the nucleus
    B. the number of neutrons in the nucleus
    C. the sum of the protons and neutrons in the nucleus
    D. the charge on its ion


6. Of the following, the element most reactive with oxygen is:

    A. Si
    B. P
    C. S
    D. Cl


7. Which of the following pairs of elements would be expected to form a covalent compound?

    A. Ca + Cl
    B. Na + Cl
    C. S + Cl
    D. Ca + S


8. Which of these has the highest melting point?

    A. LiF
    B. LiCl
    C. CsF
    D. NaBr


9. Each carbon atom in the diamond lattice is bonded covalently to:

    A. two other carbon atoms
    B. six other carbon atoms
    C. four other carbon atoms
    D. eight other carbon atoms


10. Which of the following metals is hardest?

    A. Be
    B. Mg
    C. Ca
    D. Ba












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