structure of atom

The spectral line in hydrogen spectrum obtained when the electron jumps from n=5 to n=2 energy level belongs to:

• Lyman series

• Balmer series

• Paschen series

• Pfund series

Tags

NGSS.HS-PS4-4

The correct set of four quantum numbers for the balance electron of rubidium atom

(z=37) is

• 5, 1, 1, +1/2

• 6, 0, 0, +1/2

• 5, 0, 0, +1/2

• 5, 1, 0, -1/2

Tags

NGSS.HS-PS1-1

In photoelectric effect, the kinetic energy of the photoelectrons increases linearly with the

• Wavelength of incident light

• Frequency of incident light

• Velocity of incident light

• Atomic mass of the element

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-4

Which spectra is known as fingerprint spectra?

• Continuous emission spectra

• Line emission spectra

• Absorption spectra

What are the possible values of the magnetic quantum number for an electron in a 3p orbital?

• -3, -2, -1, 0, +1, +2, +3

• -2, -1, 0, +1, +2

• -1, 0, +1

• 0

The probability of finding the electron in a certain space around the nucleus is known as:

• Schrödinger's equation

• Wavefunction

• Orbital

• Quantum numbers

The correct electronic configuration of Cr (Z=24) is

• [Ar] 3d ⁵ 4s ¹

• [Ar] 3d ⁴ 4s 2

• [Ar] 3d ⁹ 4s 2

• [Ar] 3d ¹⁰ 4s ¹

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the above is violation of Pauli’s exclusion principle ?

• A

• B

• C

• D

The radius of first orbit of hydrogen is 0.53 Å. The radius of second orbit would be

• 1.06 Å

• 0.26 Å

• 0.53 Å

• 2.12 Å

Tags

NGSS.HS-PS1-1

The energy of an electron in 3^rd orbit of hydrogen atom is:

• -1311.8 kJ/mol

• -82.0 kJ/mol

• -145.7 kJ/mol

• -327.9 kJ/mol