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Thread: Chemistry Questions - Help

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    Question Chemistry Questions - Help

    Hi, I've got a few questions on Electronic configurations of Atoms and would appreciate if you guys could help me out:

    1) So there are 4 shells which are configured as 2,8,8,8 correct? But I read somewhere in my textbook something about it being configured as 2,8,18,32 so how come it's different? Is it so that for example; Gallium could then have shells of 2,8,18,3 ?

    2) How do we find the electronic configurations of elements higher than the number of 60 (because 2+8+18+32 = 60)? My teacher said something about 2n^2 and said we will learn about that in Year 11.

    3) Why don't we count Transition metals as 'proper groups'? By that I mean, why aren't they that important because my teacher showed us the Periodic Table and showed the Valence electron configurations for Groups 1,2,13,14,15,16,17,18 and labelled them as Groups 1-8.

    4) What's the Electronic configuration of Argon? I thought it would be 2,8,8; but on Google it says Ne 3s2 3p6. What does that mean?

    5) Could transition metals form a compound? If not, why not? We learnt that if a metal and non metal bond, it's an Ionic bond, whereas if it's a compound from two non-metals, it'll be a covalent compound.

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    Re: Chemistry Questions - Help

    Quote Originally Posted by _Anonymous View Post
    Hi, I've got a few questions on Electronic configurations of Atoms and would appreciate if you guys could help me out:

    1) So there are 4 shells which are configured as 2,8,8,8 correct? But I read somewhere in my textbook something about it being configured as 2,8,18,32 so how come it's different? Is it so that for example; Gallium could then have shells of 2,8,18,3 ?

    2) How do we find the electronic configurations of elements higher than the number of 60 (because 2+8+18+32 = 60)? My teacher said something about 2n^2 and said we will learn about that in Year 11.

    3) Why don't we count Transition metals as 'proper groups'? By that I mean, why aren't they that important because my teacher showed us the Periodic Table and showed the Valence electron configurations for Groups 1,2,13,14,15,16,17,18 and labelled them as Groups 1-8.

    4) What's the Electronic configuration of Argon? I thought it would be 2,8,8; but on Google it says Ne 3s2 3p6. What does that mean?

    5) Could transition metals form a compound? If not, why not? We learnt that if a metal and non metal bond, it's an Ionic bond, whereas if it's a compound from two non-metals, it'll be a covalent compound.
    1) 2, 8, 8, 8 isn't correct I think they only say that because you only learn elements 1-20 in year 10

    2) 2n^2 is the formula where n is the shell number e.g. shell 3 has 2x9 = 18 not 8 as stated in question 1

    4) The p and s stuff are sub-orbitals not the principle shells
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    Re: Chemistry Questions - Help

    Quote Originally Posted by pikachu975 View Post
    1) 2, 8, 8, 8 isn't correct I think they only say that because you only learn elements 1-20 in year 10

    2) 2n^2 is the formula where n is the shell number e.g. shell 3 has 2x9 = 18 not 8 as stated in question 1

    4) The p and s stuff are sub-orbitals not the principle shells
    1) So how would you correctly write the Electrons per shells of Gallium?
    2) So 2n^2 basically goes back to the 2,8,18,32 structure, right? So even then, how would you find the Electrons per shell of Francium for example?
    4) Do we learn about sub orbitals and stuff in Year 11 and 12, or is this Year 10 knowledge?

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    Re: Chemistry Questions - Help

    Quote Originally Posted by _Anonymous View Post
    1) So how would you correctly write the Electrons per shells of Gallium?
    2) So 2n^2 basically goes back to the 2,8,18,32 structure, right? So even then, how would you find the Electrons per shell of Francium for example?
    4) Do we learn about sub orbitals and stuff in Year 11 and 12, or is this Year 10 knowledge?
    1) 2, 8, 18, 3 I think but I don't do chem so correct me if I'm wrong
    2) I'm pretty sure there's a maximum number then it goes back down e.g. 32, 18, 8, 2 IDK the max because I don't do chem
    4) We learnt what sub orbitals are in physics year 12 but not sure about for chem
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    Re: Chemistry Questions - Help

    Quote Originally Posted by pikachu975 View Post
    1) 2, 8, 18, 3 I think but I don't do chem so correct me if I'm wrong
    2) I'm pretty sure there's a maximum number then it goes back down e.g. 32, 18, 8, 2 IDK the max because I don't do chem
    4) We learnt what sub orbitals are in physics year 12 but not sure about for chem
    Oh ok, thanks for your help anyways.

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    Re: Chemistry Questions - Help

    Quote Originally Posted by _Anonymous View Post
    1) So how would you correctly write the Electrons per shells of Gallium?
    2) So 2n^2 basically goes back to the 2,8,18,32 structure, right? So even then, how would you find the Electrons per shell of Francium for example?
    4) Do we learn about sub orbitals and stuff in Year 11 and 12, or is this Year 10 knowledge?



    You only visit orbitals again if you do the option Chemistry of Art offered at Baulkham Hills (my school), Normanhurst and a few other private schools. Total candidature is maybe less than 500 students so chances are you probably won't see have to see it again.
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    Re: Chemistry Questions - Help

    Quote Originally Posted by andrew12678 View Post
    [/B]

    You only visit orbitals again if you do the option Chemistry of Art offered at Baulkham Hills (my school), Normanhurst and a few other private schools. Total candidature is maybe less than 500 students so chances are you probably won't see have to see it again.
    We haven't learnt it in Year 10 yet and I'm assuming we don't. So how would we state the Electronic Configuration of Argon; is 2,8,8 fine?

    Also, do you know the answers to Question 2 ("how would you find the Electrons per shell of Francium"), Question 3 and 5 (asking you cause you did Chemistry)?

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    Re: Chemistry Questions - Help

    Quote Originally Posted by pikachu975 View Post
    1) 2, 8, 18, 3 I think but I don't do chem so correct me if I'm wrong
    2) I'm pretty sure there's a maximum number then it goes back down e.g. 32, 18, 8, 2 IDK the max because I don't do chem
    4) We learnt what sub orbitals are in physics year 12 but not sure about for chem
    I don't mean to come off as hypocritical in any way but how do you know this if you don't do chem? or do you just research it?

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    Re: Chemistry Questions - Help

    Quote Originally Posted by _Anonymous View Post
    We haven't learnt it in Year 10 yet and I'm assuming we don't. So how would we state the Electronic Configuration of Argon; is 2,8,8 fine?

    Also, do you know the answers to Question 2 ("how would you find the Electrons per shell of Francium"), Question 3 and 5 (asking you cause you did Chemistry)?
    Yea 2,8,8 is fine if they ask for electron configuration. If they ask for subshell notation its 1s2 2s2 2p6 3s2 3p6.

    I guess electrons per shell would be found using 2n^2 with the principal quantum number (n) being 7
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    Re: Chemistry Questions - Help

    Quote Originally Posted by andrew12678 View Post
    Yea 2,8,8 is fine if they ask for electron configuration. If they ask for subshell notation its 1s2 2s2 2p6 3s2 3p6.

    I guess electrons per shell would be found using 2n^2 with the principal quantum number (n) being 7
    Right, do we learn about subshell notations and stuff in Year 11 and 12? Also, do the electron configurations start repeating after 32 (i.e. like Pikachu mentioned that 2,8,18,32,32,18 and so on)?

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    Re: Chemistry Questions - Help

    Quote Originally Posted by _Anonymous View Post
    Right, do we learn about subshell notations and stuff in Year 11 and 12? Also, do the electron configurations start repeating after 32 (i.e. like Pikachu mentioned that 2,8,18,32,32,18 and so on)?
    Probably not, but maybe things change with the new syllabus you get. I haven't deconstructed the new syllabus so I can't speak for that.

    I don't know if they repeat-you won't have to know things about electron arrangement, orbitals etc, beyond the first and second periods for the transition metals for HSC
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    Re: Chemistry Questions - Help

    Quote Originally Posted by Jaxxnuts View Post
    I don't mean to come off as hypocritical in any way but how do you know this if you don't do chem? or do you just research it?
    All of it was taught in junior science, it's not exclusive Yr11/12 knowledge.
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    Re: Chemistry Questions - Help

    Quote Originally Posted by _Anonymous View Post
    Right, do we learn about subshell notations and stuff in Year 11 and 12? Also, do the electron configurations start repeating after 32 (i.e. like Pikachu mentioned that 2,8,18,32,32,18 and so on)?
    Yeah you do, it's one of the changes in the new syllabus
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    Re: Chemistry Questions - Help

    Thank you guys for your help. I have a question related to Polyatomic ions; Could someone explain how Carbonate has 32 Electrons and is labelled as CO3 2-?

    What I thought was that since Carbon is giving away 4 Electrons, wouldn't two of the Oxygen atoms get 2 each? So my question is, what happens to the third Oxygen atom? I understand the third Oxygen atom is also trying to get 2 Electrons, but where will it get it from which will make the formula for Carbonate; CO3^2-?
    Last edited by _Anonymous; 20 Aug 2017 at 11:31 PM.

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    Re: Chemistry Questions - Help

    Or is it impossible to find the number of Electrons in a Polyatomic Ion? Is that why people just memorise the common Polyatomic ions?

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