Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 33

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11th CBSE

IMPORTANT

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If $R_{H}$ represents Rydberg constant, then the energy of the electron in the ground state of hydrogen atom is

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Important Questions on Structure of Atom

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 34

Ionisation energy of

{He}^{+}

is

19 \cdot 6 x 10^{- 18} J {atom}^{- 1}

. The energy of the first stationary state

(n = 1)

of

{Li}^{2 +}

is

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 35

If an electron travels with a velocity of

1 / 100 th

speed of light in the first Bohr orbit, what is its velocity (relative to the speed of light) in the

5^{th}

Bohr orbit?

EASY

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Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 36

In the hydrogen atom, the electrons are excited to the

5^{th}

energy level. The number of lines that may appear in the spectrum will be

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 37

Which of the following is the energy of a possible excited state of hydrogen ?

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 38

Calculate the energy in joule corresponding to light of wavelength

45 nm

(Planck's constant,

h = 6 \cdot 63 \times 10^{- 34} Js,

speed of light

= 3 \times 10^{8} {ms}^{- 1}

).

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 39

The radius of the second Bohr orbit for hydrogen atom is ( Planck's constant, $h = 6 \cdot 6262 x 10^{- 34} Js$ , mass of electron $= 9.1091 x 10^{- 31} kg$ , charge of electron, $e = 1 \cdot 60210 x 10^{- 1 9} C$ , permittivity of the vacuum, $\in_{o} = 8, 854185 x 10^{- 1 2} {kg}^{- 1} m^{- 3} A^{2}$ ).