Atomic Structure Quiz NCERT

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Question 1 of 8

1. Question

Calculate the number of neutrons in ${_{35}^{80}\textrm{Br}}.$

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Question 2 of 8

2. Question

The number of electrons, protons and neutrons in a species are equal to 18, 16 and 16 respectively. Assign the proper symbol to the species.

${_{18}^{32}\textrm{S}^{-2}}$

${_{18}^{32}\textrm{S}^{}}$

${_{16}^{32}\textrm{S}^{-2}}$

${_{16}^{32}\textrm{S}^{}}$

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Question 3 of 8

3. Question

The wavelength of violet is 400 nm. Express the wavelength in frequency (in tera Hz).

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Question 4 of 8

4. Question

Calculate energy of one mole of photons of radiation whose frequency is 5 ×10¹⁴ Hz.

199.51 kJ mol^-1

190.91 kJ mol^-1

180.92 kJ mol^-1

201.83 kJ mol^-1

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Question 5 of 8

5. Question

The energy of a photon emitted during a transition from n = 5 state to the n = 2 state in the hydrogen atom is – ____ ×10^-21J. Answer should be in nearest integer.

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Question 6 of 8

6. Question

What will be the wavelength (in 10 ^-37m ) of a ball of mass 0.1 kg moving with a velocity of 10 m s^–1 ?

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Question 7 of 8

7. Question

A microscope using suitable photons is employed to locate an electron in an atom within a distance of 0.1 Å. The uncertainty involved in the measurement of its velocity is 5.79 × 10^x m s^-1. The value of x is ___

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Question 8 of 8

8. Question
Match the transitions with frequency range and n_i
Sort elements
- Visible and n_i =2
- infrared and n_i = 3
- Ultraviolet and n_i = 1
- Infrared and n_i = 4
Balmer Series
Paschen Series
Lyman Series
Bracket Series
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