मराठी
महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता ११ वी

Indicate the number of unpaired electrons in Si (Z = 14).

Advertisements
Advertisements

प्रश्न

Indicate the number of unpaired electrons in \[\ce{Si}\] (Z = 14).

लघु उत्तर
Advertisements

उत्तर

Electronic configuration of \[\ce{Si}\] (Z = 14) is 1s2 2s2 2p6 3s2 3p2

Orbital diagram:

↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓  
1s 2s 2p 3s 3p

Number of unpaired electrons = 2

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 4: Structure of Atom - Exercises [पृष्ठ ५४]

APPEARS IN

बालभारती Chemistry [English] Standard 11 Maharashtra State Board
पाठ 4 Structure of Atom
Exercises | Q 6. (S)(a) | पृष्ठ ५४

संबंधित प्रश्‍न

Using s, p, d notations, describe the orbital with the following quantum numbers n = 3; l =1.


Using s, p, d notations, describe the orbital with the following quantum numbers n = 4; l =3.


Choose the correct option.

“No two electrons in the same atoms can have identical set of four quantum numbers”. This statement is known as -


State Heisenberg uncertainty principle.


Define the term Electronic configuration.


State and explain Pauli’s exclusion principle.


Write orbital notations for the electron in orbitals with the following quantum numbers.

n = 2, l = 1


Write electronic configurations of \[\ce{Fe, Fe2+, Fe3+}\].


Write condensed orbital notation of electronic configuration of the following element:

Calcium (Z = 20)


Using the concept of quantum numbers, calculate the maximum numbers of electrons present in the ‘M’ shell. Give their distribution in shells, subshells, and orbitals.


Which mineral among the following contains vanadium in it?


The designation of a subshell with n = 6 and l = 2 is ____________.


Which one of the following orders is CORRECT in case of energy of the given subshells?

P: n = 4; l = 3

Q: n = 5; I = 1

R: n = 5; l = 0

S: n = 4; l = 2


Which of the following has a greater number of electrons than neutrons?

(Mass number of Mg, C, O and Na is 24, 12, 16 and 23 respectively).


Which of the following properties of atom could be explained correctly by Thomson Model of atom?


In which of the following pairs, the ions are iso-electronic?

(i) \[\ce{Na^{+}, Mg^{2+}}\]

(ii) \[\ce{Al3^{+}, O-}\]

(iii) \[\ce{Na+ , O2-}\]

(iv) \[\ce{N3-, Cl-}\]


Nickel atom can lose two electrons to form \[\ce{Ni^{2+}}\] ion. The atomic number of nickel is 28. From which orbital will nickel lose two electrons.


The arrangement of orbitals on the basis of energy is based upon their (n + l) value. Lower the value of (n + l), lower is the energy. For orbitals having same values of (n + l), the orbital with lower value of n will have lower energy.

Based upon the above information, arrange the following orbitals in the increasing order of energy.

5f, 6d, 7s, 7p


The arrangement of orbitals on the basis of energy is based upon their (n + l) value. Lower the value of (n + l), lower is the energy. For orbitals having same values of (n + l), the orbital with lower value of n will have lower energy.

Based upon the above information, solve the questions given below:

Which of the following orbitals has the lowest energy?

4d, 4f, 5s, 5p


The arrangement of orbitals on the basis of energy is based upon their (n + l) value. Lower the value of (n + l), lower is the energy. For orbitals having same values of (n + l), the orbital with lower value of n will have lower energy.

Based upon the above information, solve the questions given below:

Which of the following orbitals has the lowest energy?

5p, 5d, 5f, 6s, 6p


What is the difference between the terms orbit and orbital?


Match species given in Column I with the electronic configuration given in Column II.

Column I Column II
(i) \[\ce{Cr}\] (a) [Ar]3d84s0
(ii) \[\ce{Fe^{2+}}\] (b) [Ar]3d104s1
(iii) \[\ce{Ni^{2+}}\] (c) [Ar]3d64s0
(iv) \[\ce{Cu}\] (d) [Ar] 3d54s1
  (e) [Ar]3d64s2

Choose the INCORRECT statement


In assigning R - S configuration, which among the following groups has highest priority?


What are the possible values of magnetic quantum number for p orbital?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×