IIT-JEE 1998 | Structure of Atom Question 47 | Chemistry

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IIT-JEE 1998

MCQ (More than One Correct Answer)

-0.5

The energy of an electron in the first Bohr orbit of H atom is -13.6 eV. The possible energy value(s) of the excited state(s) for electrons in Bohr orbits of hydrogen is (are)

-3.4 eV

-4.2 eV

-6.8 eV

-1.5 eV

IIT-JEE 1998

MCQ (More than One Correct Answer)

-0.5

Which of the following statement(s) is (are) correct?

The electronic configuration of Cr is [Ar] 3d⁵4s¹.(Atomic number of Cr = 24)

The magnetic quantum number may have negative value

In silver atom, 23 electrons have a spin of one type and 24 of the opposite type. (Atomic number of Ag = 47)

The oxidation state of Nitrogen in HN₃ is -3

IIT-JEE 1984

MCQ (More than One Correct Answer)

-0.25

Many elements have non-integral atomic masses because:

they have isotopes

their isotopes have non-integral masses

their isotopes have different masses

the constitutents, neutrons, protons and electrons combine to give fractional masses

IIT-JEE 1984

MCQ (More than One Correct Answer)

-0.25

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

alpha particles are much heavier than electrons

alpha particles are positively charged

most part of the atom is empty space

alpha particle move with high velocity

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