Hoomwork Ramadhan for XI science 2 and 3 grade

Daily Test 1 for XI science -2   grade.

 

1. Given that the following electron :

    ₆C  ,  ₁₂Y,    ₁₅Z.

   

1. write down electron c onfiguration ( orbital) for ₁₅ Z element.
2. Drawing electron configuration cell Y to ion formed.

   c.   Predict formula compound and chemical bonding from ₆X and _{17 .}

 

2. Determine quantum number ( n, l, m and s ) the last electron from the following elec-

    Tron :

  a. ₂₄X.         b. ₂₉Y.      c. ₃₀Z.

 

3. Predic the elements position following in periodic system :

  a. X ( atomic number 22 ).

  b. Y ( atomic number 28 ).

  c. Z ( atomic number 30 ).

 

4. How many electron single of the element or ions :

  a. C ( atomic number 6 )

  b. Fe³⁺ ( atomic number 26 )

  c. Cu²⁺ ( atomic number 29 )

 

5. Determine hybridization, chemical bonding kind and molecule type from the following

    Compound :

1. PCl₃ ( ₁₅P  and  ₁₇Cl )          b.  BH₃ ( ₅B  and ₁H)       c.  NH₃  (₇N  and ₁H )

 

15. Most favourable conditions for ionic bond formation are…..

      a. low charge on ions, large cation, small anion.

      b. high charge on ions, large cation, small anion.

      c. high charge on ions, small cation, large anion.

      d. high charge on ions, small cation, large anion.

 

16. Fused ionic compounds….

      Which is not true in case of ionic bond….

1. it is a linier bond.
2. No bond is 100 % ionic.
3. It is formed between between two atoms with large.
4. Its formation is favoured by low charge on cation and anion.

 

17. The presence of three unpaired electrons can be explained electrons can be   iiiiiiexplained by

      a. Pauli exclusion principle.                       c. Hun’sruler,

      b. Aufbau principle.                                    d. uncertainty principle.

 

18. The pair of elements bellow having the same valence electron is…..

      a. ₃Li and ₁₃Al.           b. ₁₁Na and ₁₉K.           c. ₉F  and ₁₉K.            c. ₅B and ₁₀Ne.

 

19. Among of the following groups which ones all the components bond covalently iiiiiiare….

      a. KCl , HF,Cl₂.                                    c. NH₃, HCl, H₂O.

      b. CO₂, NaCl, HCl.                               d. NaCl, MgCl₂, CaF₂.

 

20. The boilling point of HF greater than of HCl. It is caused betwwen the HF iiiiimolecules are

      found …..

     a. the covalent bond.                                c. the ionic bond.

    b. the hydrogen bond.                              d. the coordination  bond.