2.1 BOHRS' ATOMIC MODEL

What is the ground state for Balmer series ?

• 1

• 2

• 3

• 4

Calculate the energy of an electron at fourth energy level

• - 2.42 x 10⁻¹⁹ J

• −2.18x10⁻¹⁸ J

• 
  −1.36x10⁻¹⁹ J

• - 3.41 x 10⁻¹⁹ J

What is the wavelength of

a photon emitted during transition from

ni= 6 to nf= 4.

• 
  

  1.283 x 10⁻⁶ m

• 1.283 x 10⁻⁹ m

• 1.283 x 10⁻⁸ m

• 1.283 x 10⁻⁷ m

Choose the line with the shortest wavelength.

• P

• Q

• S

• T

FIGURE show the line spectrum in Paschen series.

Determine the transition of line R.

• 5 to 2

• 6 to 3

• 7 to 4

• 8 to 5