Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 4>Q 11

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Assertion: Angular momentum of an electron in any orbit is given by angular momentum $= \frac{nh}{2 π},$ where
$n$ is the principal quantum number.

Reason: The principal quantum number $n$ , can have any integral value.

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Important Questions on Structure of Atom

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 4>Q 12

Which of the following combinations of quantum numbers is allowed?

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 4>Q 13

The electrons identified by quantum numbers n and

l

(i) n = 4, l = 1 (ii) n = 4, l = 0 (iii) n = 3, l = 2 (iv) n = 3, l = 1

can be placed in order of increasing energy, from the lowest to highest, as

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 4>Q 14

In hydrogen atomic spectrum, a series limit is found at

12186.3 {c m}^{- 1}

. Then, it belongs to

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 4>Q 15

Assertion: Spin quantum number can have two values,

+ \frac{1}{2}

and

- \frac{1}{2}

Reason:

+

and

-

signs signify the positive and negative wave functions.

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 4>Q 16

The degeneracy of hydrogen that has energy equal to

\frac{- R_{H}}{9}

is

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 4>Q 17

The electrons identified by quantum numbers

n

and

ℓ :

a)

n = 4, ℓ = 1

b)

n = 4, ℓ = 0

c)

n = 3, ℓ = 2

d)

n = 3, ℓ = 1

can be placed in the order of increasing energy as

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 4>Q 18

Which transition in the hydrogen atomic spectrum will have the same wavelength as the Balmer transition (i.e.,

n = 4

to

n = 2

) of

{He}^{+}

spectrum?

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 4>Q 19

Wavelength of particular transition for

H

atom is

400 nm

. What can be wavelength of

{He}^{+}

for same transition