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JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

1 Easy

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The number of waves in an orbit are

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Correct option: B

n

Option B (

n

) is correct because the number of waves in an orbit is equal to the principal quantum number,

n

.

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Bohr's orbit of the hydrogen atom is The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency '

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\times 10^{12}

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\ell = 1,\,\,m = 0

in magnesium atom is The nucleus and an atom can be assumed to be spherical. The radius of the nucleus of mass no. A is given by

1.25 \times {10^{ - 13}} \times {A^{1/3}}\mathrm{cm}.

. The atomic radius of atom is 1 Å. If the mass no. is 64, the fraction of the atomic volume that is occupied by nucleus is: