STRUCTURE OF ATOM

1. What information do we get from quantum numbers and what do they convery? (AS 1) 4 Marks

2. Which atomic model indicates that "In an atom, electrons are present in definite energy levels situated at a particular distance from nucleus". Write the postulates of that Atomic model and also mention its limitations. (AS 1) 4 Marks

3. In an atom the number of electrons in M - shell are equal to the number of electrons in K and L shells. (AS 4) 4 Marks
Then answer to the following questions.
    i) Which is outermost shell?
    ii) How many electrons are present in the outermost shell?
    iii) What is its atomic number?
    iv) Write the electronic configuration of this element?

4. Electronic configuration of an element is 1s² 2p⁶ 3s² 3p⁶ which rule is not obeyed while writing this? Explain. (AS 1) 2 Marks

5. An electron goes into 4s orbital after filling of 3p orbital but not 3d orbital. Predict the reason and write it? (AS 2) 2 Marks

6. Electronic configuration of an element is 1s² 2s² 2p¹. Write the four quantum number values for 2p¹ valance electron. (AS 1) 2 Marks
7. If the quantum numbers of an electron in the outermost orbit of an atom are as given below. (AS 4) 2 Marks

ⁿ

^m_l

^m_s

⁰

⁺

     i) What is the outermost shell?
     ii) Write the electronic configuration.
     iii) What is its atomic number?
     iv) Write its valency.

8. Discuss the reasons for introduction of Elliptical orbits by Sommerfeld. (AS 1)    2 Marks

9. Draw the figure of Sommerfeld model showing second energy level. (n = 2) (AS 5) 2 Marks

10. How many elliptical orbits Sommerfeld had added to Bohr's fourth orbit? Show with the help of a figure. (AS 5) 2 Marks

11. Fill the following table. (AS 1) 2 Marks

^l	⁰	¹	²	³
^Sub-shell
^{Number of orbitals}

12. Complete the table given below (AS 1 ) 2 Marks

^Sub-shell

^{s(l = 0)}

^{p(l = 1)}

^{d(l = 2)}

^{f(l = 3)}

^{No.of orbitals}

^{No. of maximum}

^electrons

13. Write the electronic configuration of the elements given in the below table. (AS 1) 2 Marks

^Element	^{Atomic Number}	^{Electron configuration}
^C	⁶
^Al	¹³
^Ar	¹⁸
^Ca	²⁰

14. Write the Planck's equation for the energy of electromagnetic radiation and write the value of Planck's constant. (AS 1) 2 Marks

15. State Hund's rule and explain with one example. (AS 1)                                          2 Marks

16. In nl^x, what do n, l , x indicate? (AS 1)                                                                        1 Mark

17. A student has written electronic configuration of Carbon as following.
      ^{Which rule does not support this? (AS 1)}                         ^{1 Mark}

18.

Observe the figure. Which is the orbital given? (AS 5)                                                   1 Mark

19. What colours do you observe when Strantium chloride and Cupric chloride are put to Flame test? (AS 3) 1 Mark

20.

What does the above diagram shows? (AS 5) 1 Mark

Posted Date : 17-11-2020

గమనిక : ప్రతిభ.ఈనాడు.నెట్‌లో కనిపించే వ్యాపార ప్రకటనలు వివిధ దేశాల్లోని వ్యాపారులు, సంస్థల నుంచి వస్తాయి. మరి కొన్ని ప్రకటనలు పాఠకుల అభిరుచి మేరకు కృత్రిమ మేధస్సు సాంకేతికత సాయంతో ప్రదర్శితమవుతుంటాయి. ఆ ప్రకటనల్లోని ఉత్పత్తులను లేదా సేవలను పాఠకులు స్వయంగా విచారించుకొని, జాగ్రత్తగా పరిశీలించి కొనుక్కోవాలి లేదా వినియోగించుకోవాలి. వాటి నాణ్యత లేదా లోపాలతో ఈనాడు యాజమాన్యానికి ఎలాంటి సంబంధం లేదు. ఈ విషయంలో ఉత్తర ప్రత్యుత్తరాలకు, ఈ-మెయిల్స్ కి, ఇంకా ఇతర రూపాల్లో సమాచార మార్పిడికి తావు లేదు. ఫిర్యాదులు స్వీకరించడం కుదరదు. పాఠకులు గమనించి, సహకరించాలని మనవి.