Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    10
    ReputationRep:
    In my a-level chemistry textbook it says that when sodium and chlorine ionically bond, both the ions have a full outer shell and the sodium ion has an electronic configuration of 2,8 (1s2 2s2 2p6) and the chloride ions is 2,8,8. It says BOTH the ions have a full outer shell but isn't this incorrect for the chloride as the 3rd shell holds up to 18 electrons because 2 in s orbital + (3x2) in p orbitals + (5x2) in d orbitals = 18. Is what the textbook says wrong? surely the chloride ion doesnt have a a full outer shell with just 8 or have I confused myself? Surely it should instead say become more stable.sorry if this makes no sense
    Offline

    6
    ReputationRep:
    Chlorine is in period 3 so it doesn't have any p-orbital
    • Political Ambassador
    Offline

    16
    ReputationRep:
    (Original post by xxNoodlezxx)
    In my a-level chemistry textbook it says that when sodium and chlorine ionically bond, both the ions have a full outer shell and the sodium ion has an electronic configuration of 2,8 (1s2 2s2 2p6) and the chloride ions is 2,8,8. It says BOTH the ions have a full outer shell but isn't this incorrect for the chloride as the 3rd shell holds up to 18 electrons because 2 in s orbital + (3x2) in p orbitals + (5x2) in d orbitals = 18. Is what the textbook says wrong? surely the chloride ion doesnt have a a full outer shell with just 8 or have I confused myself? Surely it should instead say become more stable.sorry if this makes no sense
    Not entirely sure but I think you're right and the textbook means that it has a full outer subshell (ie the 2p subshell is full, but the 2d subshell is not).
    • Thread Starter
    Offline

    10
    ReputationRep:
    (Original post by sara1479)
    Chlorine is in period 3 so it doesn't have any p-orbital
    I'm confused - it must have p-orbitals. A chlorine atoms configuration is [Ne] 3s2 3p5 and a chlorine ions configuration is [Ne] 3s2 3p6. Doesn't The fact its in period 3 mean it has 3 energy levels plus chlorine is also situated in the p-block.
    • Thread Starter
    Offline

    10
    ReputationRep:
    (Original post by KomradeKorbyn)
    Not entirely sure but I think you're right and the textbook means that it has a full outer subshell (ie the 2p subshell is full, but the 2d subshell is not).
    Ahh thank you I shall write this on my flashcard instead
    Offline

    6
    ReputationRep:
    (Original post by xxNoodlezxx)
    I'm confused - it must have p-orbitals. A chlorine atoms configuration is [Ne] 3s2 3p5 and a chlorine ions configuration is [Ne] 3s2 3p6. Doesn't The fact its in period 3 mean it has 3 energy levels plus chlorine is also situated in the p-block.
    My bad, I meant d-orbitals. Even though the 3d orbitals aren't filled, 3s and 3p are. Besides, 4s orbital needs to be filled first before the 3d ones. D-block elements work a bit different from s and p-block ones. D-block elements usually have more than 1 oxidation (stable) states
    • Thread Starter
    Offline

    10
    ReputationRep:
    (Original post by sara1479)
    My bad, I meant d-orbitals. Even though the 3d orbitals aren't filled, 3s and 3p are. Besides, 4s orbital needs to be filled first before the 3d ones. D-block elements work a bit different from s and p-block ones. D-block elements usually have more than 1 oxidation (stable) states
    ohhh, thank you
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Did TEF Bronze Award affect your UCAS choices?
    Help with your A-levels

    All the essentials

    The adventure begins mug

    Student life: what to expect

    What it's really like going to uni

    Rosette

    Essay expert

    Learn to write like a pro with our ultimate essay guide.

    Uni match

    Uni match

    Our tool will help you find the perfect course for you

    Study planner

    Create a study plan

    Get your head around what you need to do and when with the study planner tool.

    Study planner

    Resources by subject

    Everything from mind maps to class notes.

    Hands typing

    Degrees without fees

    Discover more about degree-level apprenticeships.

    A student doing homework

    Study tips from A* students

    Students who got top grades in their A-levels share their secrets

    Study help links and info

    Can you help? Study help unanswered threadsRules and posting guidelines

    Sponsored content:

    HEAR

    HEAR

    Find out how a Higher Education Achievement Report can help you prove your achievements.

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • 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

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