Home
Class 11
CHEMISTRY
A1though quantum mechanics tells us that...

`A1`though quantum mechanics tells us that we cannot pinpoint an electorn in an atom, it does define the region where the electron might be at a given time. The concept of_______gives the probability that an electron will be found in a particular region of an atom.

A

electron mass

B

electron charge

C

electron size

D

electron density

Text Solution

Verified by Experts

The correct Answer is:
D

The square of the waves function `(psi^(2))` denfines the distribution of electron density in space around the nucleus.
Promotional Banner

Topper's Solved these Questions

  • STRUCTURE OF ATOM

    R SHARMA|Exercise Follow-up Test 2|1 Videos
  • STRUCTURE OF ATOM

    R SHARMA|Exercise Follow-up Test 3|1 Videos
  • STRUCTURE OF ATOM

    R SHARMA|Exercise Follow-up Test 1|1 Videos
  • STATES OF MATTER

    R SHARMA|Exercise ARCHIVES|41 Videos
  • THE P BLOCK ELEMENTS

    R SHARMA|Exercise Archives|40 Videos

Similar Questions

Explore conceptually related problems

A region in space around the nucleus of an atom where the probability of finding the electron is maximum is called

A: Bohr's orbits are regions where the electron may be found with large probability. R: The orbital picture in Bohr's model of the hydrogen atom was inconsistent with the uncertainty principle.

An electron in an atom can be completely designated with the help of four quantum numbers. Out of these, the first three i.e., principal (n), azimuthal (l) and magnetic (m) quantum number are obtained from the solution of Shrodinger wave equation while the spin(s) quantum number arises from the spin of the electron around its axis clockwise or antiaclockwise. Ot of these principal quantum number tells about the size, azimuthal quantum number about the shape and magnetic quantum signifies the orientation of the electron orbital. How many electrons in a given atom have the following set of quantium numbers? n = 3, l =2, m = +2, s = -1//2

Orbital is the region in an atom where the probability of finding the electron around the nucleus. Orbitals do not specify a definite path according to the uncertainty principle. An orbital is described with the help of wave function Phi . Whenever an electron is described by a wave function, we say that an electron occupies that orbital. Since, many wave functions are possible for an electron, there are many atomic orbitals in an atom. Orbitals have different shapes, except s-orbitals, all other orbitals hae different shapes, except s-orbitals, all other orbital have different shapes, except s-orbitals, all other orbitals have directional character. Number of spherical nodes in an orbital is equal to (n-l-1) . Orbital angular momentum of an electron is sqrt(l(l+1))h . Q. When an atom is placed in a magnetic field, the possible number of orientations for an orbital of azimuthal quantum number 3 is:

An atom is assumed to tbe spherical in shape and thus, the size of atom is generally given in terms of radius of the sphere and is called atomic radius. It is usually defined as the distance between the centre of the nucleus and outermost shell where electron are present. The exact measure of atomic radius is not easy due to following reasons: (i) The atom does not have well defined boundary. the probability of finding the electron is never zero even at large distance from the nucleus. (ii) It is not possible to get an isolated atom. the electron density around an atom is affected by the presence of neighbouring atoms, i.e., the size of the atom changes in going from one set of environement to another. (iii) the size of an atom is very small, of the order of about 1.2 Å,i.e., 1.2xx10^(-10)m . An estimate of the size of the atom can, however, be made by knowing the distance betweent he atoms in the combined state. the distance between the atoms, i.e., bond length are generally measured by the application of techniques such as X-ray differaction, electron diffraction, infrared spectroscopy, nuclear magnetic resonance spectroscopy, etc. However, bond lengths change with different type of bonding. Three types of radius are commonly used, i.e., (a) Covalent radius " " (b) crystals radius " " (c) Vander waal's radius Choose incorrect option regarding atomic radius

An atom is assumed to tbe spherical in shape and thus, the size of atom is generally given in terms of radius of the sphere and is called atomic radius. It is usually defined as the distance between the centre of the nucleus and outermost shell where electron are present. The exact measure of atomic radius is not easy due to following reasons: (i) The atom does not have well defined boundary. the probability of finding the electron is never zero even at large distance from the nucleus. (ii) It is not possible to get an isolated atom. the electron density around an atom is affected by the presence of neighbouring atoms, i.e., the size of the atom changes in going from one set of environement to another. (iii) the size of an atom is very small, of the order of about 1.2 Å,i.e., 1.2xx10^(-10)m . An estimate of the size of the atom can, however, be made by knowing the distance betweent he atoms in the combined state. the distance between the atoms, i.e., bond length are generally measured by the application of techniques such as X-ray differaction, electron diffraction, infrared spectroscopy, nuclear magnetic resonance spectroscopy, etc. However, bond lengths change with different type of bonding. Three types of radius are commonly used, i.e., (a) Covalent radius " " (b) crystals radius " " (c) Vander waal's radius Choose incorrect option regarding atomic size

Orbital is the region in an atom where the probability of finding the electron around the nucleus. Orbitals do not specify a definite path according to the uncertainty principle. An orbital is described with the help of wave function Phi . Whenever an electron is described by a wave function, we say that an electron occupies that orbital. Since, many wave functions are possible for an electron, there are many atomic orbitals in an atom. Orbitals have different shapes, except s-orbitals, all other orbitals hae different shapes, except s-orbitals, all other orbital have different shapes, except s-orbitals, all other orbitals have directional character. Number of spherical nodes in an orbital is equal to (n-l-1) . Orbital angular momentum of an electron is sqrt(l(l+1))h . Q. Orbital angular momentum of f-electrons is:

An atom is assumed to tbe spherical in shape and thus, the size of atom is generally given in terms of radius of the sphere and is called atomic radius. It is usually defined as the distance between the centre of the nucleus and outermost shell where electron are present. The exact measure of atomic radius is not easy due to following reasons: (i) The atom does not have well defined boundary. the probability of finding the electron is never zero even at large distance from the nucleus. (ii) It is not possible to get an isolated atom. the electron density around an atom is affected by the presence of neighbouring atoms, i.e., the size of the atom changes in going from one set of environement to another. (iii) the size of an atom is very small, of the order of about 1.2 Å,i.e., 1.2xx10^(-10)m . An estimate of the size of the atom can, however, be made by knowing the distance betweent he atoms in the combined state. the distance between the atoms, i.e., bond length are generally measured by the application of techniques such as X-ray differaction, electron diffraction, infrared spectroscopy, nuclear magnetic resonance spectroscopy, etc. However, bond lengths change with different type of bonding. Three types of radius are commonly used, i.e., (a) Covalent radius " " (b) crystals radius " " (c) Vander waal's radius The correct order of effective nuclear charge Z_(eff) is

R SHARMA-STRUCTURE OF ATOM-Follow-up Test
  1. The solutions (there are many) to the Schrddot(o)dinger equation are c...

    Text Solution

    |

  2. The best way to think about a wave function is to regard it as an expr...

    Text Solution

    |

  3. A1though quantum mechanics tells us that we cannot pinpoint an elector...

    Text Solution

    |

  4. The mathematical approach of quantum mechanics involves treating the e...

    Text Solution

    |

  5. In 1926, Erwin Schrddot(o)dinger modified an existing equation that de...

    Text Solution

    |

  6. The Schrddot(o)dinger equation has been solved exactly only for (i) ...

    Text Solution

    |

  7. Quantum mechancial model of atom is the picture of the structure of th...

    Text Solution

    |

  8. Which of the following is not ture for the quantum mechanical model of...

    Text Solution

    |

  9. According to quantum mechanics, each electron in an atom is described ...

    Text Solution

    |

  10. A wave function for an electron in an atom is called

    Text Solution

    |

  11. The enegry of an electron in an atom//ion depends principally on

    Text Solution

    |

  12. Orbitals of the same quantum stateare said to belong to the same shell...

    Text Solution

    |

  13. Which of the following quantum numbers relates to the average distance...

    Text Solution

    |

  14. Maximum number of orbitals is given shell identified by the principal ...

    Text Solution

    |

  15. Which of the following quantum numbers distinguishes the orbitals of g...

    Text Solution

    |

  16. Within the M shell, there arekinds of orbitals, each having a differen...

    Text Solution

    |

  17. A1though the energy of an orbital is principally determined by the n q...

    Text Solution

    |

  18. Orbitals of the samebut differentare said to belong to different subsh...

    Text Solution

    |

  19. The angular momentum quantum number (l) does not tell us theof the orb...

    Text Solution

    |

  20. The possible values of l depend on the value of the principal quantum ...

    Text Solution

    |