Quantum Numbers and Chemical Bonds Quiz
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Questions and Answers

Which of the following statements regarding quantum numbers is INCORRECT?

  • The azimuthal quantum number (l) defines the shape of an orbital, with possible values ranging from 0 to n-1.
  • The magnetic quantum number (ml) dictates the orientation of an orbital in space, and its values range from -l to +l, including 0, and thus there are always (2l + 1) magnetic sub-levels. (correct)
  • The principal quantum number (n) can only take positive integer values, representing energy levels.
  • The spin quantum number (ms) describes the intrinsic angular momentum of an electron, and can take values of ±1/2, these represent spin-up and spin-down.

    • A sub-level with an azimuthal quantum number (l) equal to 3 can accommodate a maximum of how many electrons?

  • 10
  • 18
  • 6
  • 14 (correct)

    • Which element possesses the following outer electron configuration: $ns^2 np^3$?

  • Bromine (35Br)
  • Sulfur (16S)
  • Calcium (20Ca)
  • Arsenic (33As) (correct)

    • A neutral Rubidium atom (37Rb) contains how many p-electrons?

    <p>18</p> Signup and view all the answers

    In which type of bonding are electrons delocalized within a ‘sea’?

    <p>Metallic</p> Signup and view all the answers

    Among the given polar solvents, which one shows the LEAST miscibility with nonpolar covalent substances?

    <p>Water</p> Signup and view all the answers

    How many lone pairs of electrons are present on the central nitrogen atom in an ammonia molecule ($NH_3$)?

    <p>1</p> Signup and view all the answers

    In the molecule $CH_2=CH–C≡CH$, what is the total number of sigma (σ) and pi (π) bonds?

    <p>7 σ and 3 π</p> Signup and view all the answers

    Study Notes

    Quantum Numbers

    • Incorrect statement about quantum numbers: Principal quantum number (n) can't be 1, 2, 3...

    Maximum Number of Electrons

    • Maximum electrons accommodated in a sub-level with / = 3 is 14

    Outer Electronic Configuration

    • The outer electronic configuration ns2np3 corresponds to element As

    'p' Electrons in Rubidium

    • The number of p electrons in Rubidium is 9

    Types of Bonds

    • Electron sea exists in metallic bonds

    Covalent Bond Solubility

    • Covalent bonds are less soluble in polar solvents like benzene

    Bond Pairs in Ammonia

    • Number of lone pair electrons in ammonia molecule is 1

    Sigma and Pi Bonds in CH2=CH-C≡CH

    • The number of sigma (σ) and pi (π) bonds in CH2=CH-C≡CH is 9 and 3

    Wave Length Associated with Photon

    • The wavelength associated with a photon of energy 3.6 x 10-19 J is 5.50 nm

    Minimum Bond Angle

    • The minimum bond angle is in NH3

    Phosphorus Ion Formula

    • The formula of the ion formed when phosphorous achieves noble gas electron configuration is P3−

    Hybridization in PCl5

    • The hybridization of the central atom in PCl5 is sp3d

    Hybridization and Geometry of Ammonia

    • Ammonia (NH3) has sp3 hybridization and trigonal pyramidal geometry

    Atomic Number 27

    • The element with atomic number 27 belongs to the d-block

    Pi Bond Formation

    • A π (pi) bond is formed by the overlap of two p orbitals

    Hybridization of AB3

    • The hybridization of a neutral AB3 molecule with two shared electron pairs is sp3.

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    Description

    Test your understanding of quantum numbers, electron configuration, and types of chemical bonds in this quiz. Topics include maximum number of electrons, bond types, and solubility in various solvents. Great for chemistry students seeking to reinforce their knowledge.

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