Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta
    • Thread Starter
    Offline

    11
    ReputationRep:
    Hi,

    I'm reading back over parts of 'Why Chemical Reactions Happen' and don't really understand what it means by 'nodes' and 'nodal planes' when talking about orbitals.

    For example: "In contrast, when the two coefficients have opposite sign, the two atomic orbitals detract from one an other in what is called destructive or out of phase overlap. This leads to the formation of the anti-bonding molecular orbital which has a node at the mid-point along the bond [...] the anti-bonding molecular orbital has a nodal plane between the two atoms."

    It also talked about 'radial nodes' earlier on. Could someone please explain what these 'nodes' mean exactly?

    Thanks
    Offline

    1
    ReputationRep:
    In simple terms, nodes are regions of the orbital where the probability of finding an electron is zero.
    • Thread Starter
    Offline

    11
    ReputationRep:
    (Original post by Oxazole)
    In simple terms, nodes are regions of the orbital where the probability of finding an electron is zero.
    Thanks So why is the probability zero there?
    Offline

    3
    ReputationRep:
    This is a pretty good summary without going into too much quantum mechanics. I can't really think of an intuitive explanation, but you can see the pattern of having (n - ℓ - 1) radial nodes, and ℓ angular nodes. In short, they come about because energy and angular momentum are quantised. Why they're quantised gets a bit messy!
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: October 17, 2015
Poll
Do you agree with the proposed ban on plastic straws and cotton buds?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.