Atoms of which of the following elements are largest?

a. Rb

b. K

c. Na

7 Answers

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  • 1 decade ago
    Favorite Answer

    Answer is A. Rb

    Rb = 2,8,18,8,1

    K = 2,8,8,1

    Na = 2,8,1

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  • 1 decade ago

    Definitely Rb, because it's atomic number is higher than Sodium and Potassium, it contains more protons and electrons, meaning it is heavier and larger, not an expert, but have taken chemistry.

    Source(s): College Chem B+
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  • 1 decade ago

    Rb since on the periodic table as your go more down and left the element gets bigger and Rb is below (on the periodic table) K and Na.

    And yea as you go up and right the element gets smaller.

    Source(s): Learned it like a week or 2 ago. http://www.elementsdatabase.com/Images/periodic_ta...
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  • 1 decade ago

    Rb....K is potassium and na is sodium and theyre both in the first 20 elements which Rb is not so it is larger.

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  • Anonymous
    1 decade ago

    Rb - Rubidium. It has isotope 37.

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  • 1 decade ago

    a. Rb

    im 12 and i just

    got done learning

    atoms

    =]

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  • Anonymous
    1 decade ago
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