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Thread: need help!!!!!

  1. #1 need help!!!!! 
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    how can the bohr model of the atomic structure be used to explain the reactivity of alkali metals

    and

    what is the relationship between melting point and atomic radius? explain why there is this pattern in melting points
    use ideas about atoms and forces in the answer



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  3. #2  
    Forum Freshman rjc34's Avatar
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    the alkali metals are so very reactive because they only have 1 valence electron. Since all elements want to achieve a stable octet, they fight hard to give that electron away, hence, high reactivity with anything that will take that electron.


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  4. #3  
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    and as the atomic ridius is increasing, the outer electrons are becoming further and further from the nucleus, so the force of attraction is weakened, which is why the melting point decreases
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  5. #4  
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    And as the atomic radius increases there are more inner electrons to shield the outer electron from the attractive force of the nucleus
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