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Renee99

  • 2 years ago

Chemistry Question: Which of the following elements has two valence electrons? -Sr<<My answer -Na -Al -B is this right?

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  1. joshuamcelwain
    • 2 years ago
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    Since valence electrons are those in the most outer shell of any element, I would say you chose the correct one!

  2. Renee99
    • 2 years ago
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    Yay! I thought so but for some reason, I was thinking Na, Sodium, because I couldn't remember if it had 1 or 2 valence electrons, but I'm pretty sure it only has one... Thanks for your help!

  3. joshuamcelwain
    • 2 years ago
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    Yeah sodium actually only has 1!

  4. Renee99
    • 2 years ago
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    okay, thanks again!

  5. Susan9419
    • 2 years ago
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    your correct ;D it is sr ;D

  6. Renee99
    • 2 years ago
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    okay, thanks! I'm gonna be posting some more, do u think could u help me with those as well?

  7. Renee99
    • 2 years ago
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    Carbon has an atomic number of 6, but the following orbital notation for carbon is incorrect. Explain the error in terms of the rules for electron arrangements.

  8. Renee99
    • 2 years ago
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  9. Susan9419
    • 2 years ago
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    sure ill help ;D

  10. Renee99
    • 2 years ago
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    thanks! :)

  11. Susan9419
    • 2 years ago
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    Electrons repel each other, since they have like charges. You put them in different orbitals if at all possible, since that keeps them naturally further apart, and lowers the energy of the electron configuration. You only start doubling them up when you must.

  12. Renee99
    • 2 years ago
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    I have read that one before, the link wont open properly

  13. Susan9419
    • 2 years ago
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    well thats the explaination and the picture should be like this |dw:1349193339649:dw|

  14. Renee99
    • 2 years ago
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    do u think u could help me put it in my own word, i'm kind of bad at it but I do get the basic idea of what there saying. It just kind of confuses me, I wasn't able to read my lesson on this topic yet, so Im pretty much doing it from what I already know.

  15. Renee99
    • 2 years ago
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    These are all of my questions answered, we can look over them later when we're done with the other one. http://answers.yahoo.com/question/index;_ylt=AoiOdWTAB6ymkg8yo6ZD147sy6IX;_ylv=3?qid=20121002090220AAnTWQD http://answers.yahoo.com/question/index?qid=20121002085855AAjGv2O

  16. Renee99
    • 2 years ago
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    sorry lost connection there for a minute

  17. Renee99
    • 2 years ago
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    Which of the following is a possible noble gas notation? -[Xe] 6s26p6 -[Kr] 5s25d85p6<<My answer -[Xe] 6s25d106p4 -[Kr] 5s24d105p3

  18. Renee99
    • 2 years ago
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    Which of the following is a reasonable ground-state electron configuration? -1s21p62s22p63s2 -1s22s22p63s23p64s24d8<<My answer -1s22s22p63p6 -1s22s22p63s1

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