Why does the charge to mass ratio of positive rays depend on the residual gas in the discharge tube? Why is the charge to mass ratio of all cathode rays are same?

2

(a)

Calculate energy of one mole of photons of radiation whose frequency is 5 x 10¹⁴ HZ.

2

(a)

In astronomical observations, signals observed from the distant stars are generally weak. If the photon detector receives a total of 3.15 × 10^–18 J from the radiations of 600 nm, calculate the number of photons received by the detector.

2

(a)

Calculate wave number of the line having frequency 5 x 10¹⁶ Hz.

2

(a)

Calculate the energy of one mole of the photons of a beam of light having wavelength 25.0 \(\mu \)m.

2

(a)

Give the number of electrons in the species H₂⁺, H₂ and O₂⁺. 

2

(a)

An ion with mass number 37 possesses one unit of negative charge. If the ion conatins 11.1% more neutrons than the electrons, find the symbol of the ion.

2

(a)

Give the relation between wavelength and momentum of moving microscopic particle. What is the relation known as?

2

(a)

Arrange X-rays, cosmic rays and radio waves according to frequency.

2

(a)

What is common between d _xy and d_x²-y² orbitals?

2

(a)

Distinguish between a photon and quantum.

2

(a)

What type of metals are used in photoelectric cells? Give one example.

2

(a)

What is difference between the notations I and L?

2

(a)

Which orbital is non-directional?

2

(a)

What is the difference between the notations 1and L?

2

(a)