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Home » Class 11 » Chemistry » s-Block Elements » Diagonal Relationship of Lithium And Magnesium

Diagonal Relationship of Lithium And Magnesium

Last Updated on May 3, 2020 By Mrs Shilpi Nagpal 16 Comments

Diagonal Relationship of lithium with magnesium

The main points of similarity :

1) Both have almost similar electronegativities.

2) Both Li and Mg are quite hard. They are harder and lighter than other elements in their respective groups.

3) Both LiOH and Mg(OH)2 are weak bases.

4) Both form ionic nitrides when heated in atmosphere of Nitrogen.

6 Li + N2 ——–> 2 Li3N

3 Mg + N2 ——–> 2 Mg3N2

5) The hydroxides of both lithium and magnesium decompose upon heating.

2 LiOH —–> Li2O + H2O

Mg(OH)2 —-> MgO + H2O

6) Both lithium and magnesium combine with oxygen to form monooxide while other members of their respective groups form peroxide and superoxide.

4 Li + O2 —–> 2 Li2O

2 Mg + O2 —–> 2 MgO

The Li2O and MgO thus formed do not combine with excess O2 to form peroxide and superoxide.

7) The carbonates of these metals decompose on heating to the corresponding oxides with the evolution of carbon dioxide.

Li2CO3 ——-> Li2O + CO2

MgCO3 ———–> MgO + CO2

8) Both Lithium and magnesium do not form solid bicarbonates.

9) Both Lithium and magnesium nitrate decompose on heating producing nitrogen dioxide.

4 LiNO3 ——> 2 Li2O + 4 NO2 + O2

2 Mg(NO3)2 ———-> MgO + 4 NO2 + O2

10) The hydroxides ,carbonate, oxalates, phosphates and fluorides of both Lithium and magnesium are sparingly soluble in water.

11)Because of the covalent character , LiCl and MgCl2 are soluble in ethanol.

12) Both Lithium perchlorate and magnesium perchlorate are highly soluble in ethanol.

13) LiCl and MgCl2 are deliquescent and crystallise from aqueous solution as hydrate LiCl·2 H2O and MgCl2 ·6 H2O.

Filed Under: Chemistry, Class 11, s-Block Elements Tagged With: Diagonal relationship of lithium with magnesium

About Mrs Shilpi Nagpal

Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. She has started this educational website with the mindset of spreading Free Education to everyone.

Reader Interactions

Comments

  1. Varsha Vaswani says

    April 1, 2018 at 1:35 pm

    Very useful information.

    Reply
    • Hafiz Moazzam Ali says

      April 15, 2019 at 4:14 pm

      Thank you very much for useful information to convey to use in easy words

      Reply
  2. Snehal says

    December 9, 2018 at 7:01 pm

    Very useful information thx

    Reply
  3. Ajay says

    December 18, 2018 at 7:44 pm

    Its usefull very thnx

    Reply
  4. abubakar umer says

    January 2, 2019 at 11:20 pm

    thank you for this beneficial piece of information.

    Reply
  5. Bilikisu TIjjani says

    June 19, 2019 at 1:00 am

    Thank you I really appreciate this information because it straight forward for the topic Commercial use of micro-organism

    Reply
  6. Nzugua Loyola says

    July 13, 2019 at 4:23 am

    Splendid notes on Diagonal Relationship Of Lithium And Magnesium

    Reply
    • Bernsah Clifort says

      October 23, 2020 at 9:36 am

      Thanks so much

      Reply
  7. Jane says

    July 13, 2019 at 7:59 pm

    good class notes on Diagonal Relationship Of Lithium And Magnesium

    Reply
  8. Mohamed says

    September 26, 2019 at 9:31 pm

    Thank you for your help

    Reply
  9. magezi joshua says

    November 19, 2019 at 12:44 pm

    thank youu soo much.

    Reply
  10. Shantipriya Doloi says

    November 23, 2019 at 9:15 pm

    Very useful

    Reply
  11. Sangram says

    December 1, 2019 at 2:48 pm

    twas vry helpful
    thnx…

    Reply
    • Anjali vashist says

      March 17, 2020 at 6:30 pm

      Very much useful

      Reply
  12. zarshal khan says

    June 12, 2020 at 11:19 am

    very easy notes

    Reply
  13. Ayush says

    November 18, 2020 at 9:24 pm

    thankyou ma’am for this this answer

    Reply

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