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Structure of At...

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  • Question 1
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    Cathode rays have

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    Atoms of elements A and B, having same mass number but different atomic numbers are called

  • Question 3
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    The isotopes of an element differ in

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    When alpha particles are sent through a thin metal foil ,most of them go straight through the foil because

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    The number of neutrons, in dipositive zinc ion Zn2+, with mass number 70 is

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    An electron in a 4s orbital has a magnetic quantum number value of

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    Which of the following statements is wrong?

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    Bohr model can explain the

  • Question 9
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    The principal quantum number of an atom is related to the

  • Question 10
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    Electromagnetic radiation with maximum wave length is

  • Question 11
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    Which of the following statements is correct?

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    Atoms may be regarded as comprising of protons neutrons and electrons. If the mass attributed to a neutron were halved and that attributed to the electron were doubled, the atomic mass of 6C12 would

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    It is impossible to determine the exact position and the exact momentum of an electron, simultaneously. This statement is known as:

  • Question 14
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    Directions: The following question has four choices out of which ONLY ONE is correct.

    The Aufbau's principle implies that a new electron will enter an orbital, for which,

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    Rutherford's alpha particles scattering experiment eventually led to the conclusion that

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    Which of the following sets of quantum numbers is correct for an electron in a 4f orbital?

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    The addition of a neutron to the nucleus of an atom results in the

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    Which of the following isoelectronic species has more electrons than neutron?

  • Question 19
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    The maximum number of 4f electrons, having spin quantum number 1/2 is

  • Question 20
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    The statement 'An s orbital is spherical in shape', means that

  • Question 21
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    Electronic configuration of niobium (Nb = 41) is

  • Question 22
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    How many electrons have their spins paired in an atom of oxygen (Atomic Number 8)?

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    The atomic weight of an element is 52 and the atomic number is 24. The number of electrons, protons and neutrons in an atom of this element will be, respectively,

  • Question 24
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    When electrons revolve in stationary orbits,

  • Question 25
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    Neutrons are present in the nuclei of all elements, except

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