What is the total number of atomic orbitals in an atom with the principal quantum number n =3

• 3
• 13
• 9

• 18

The electronic configuration of the ₇N^3- ion is

• 1s² 2s² 2p³
• 1s² 2s² 2p⁶
• 1s² 2s² 2p³ 2p⁶ 3s² 3p²
• 1s² 2s² 2p³ 2p⁶ 3s² 3p⁶

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The Lyman series in the hydrogen spectrum is found in

• the ultraviolet region
• the visible region
• the infrared region
• the X-ray region

What would be the wavelength of the third line in Balmer series?

• 316 nm
• 434 nm
• 534 nm
• 757 nm

The line with the shortest wavelength is produced in the hydrogen spectrum when electron moves

• from n=2 to n=1
• from n=3 to n=1
• from n=4 to n=1
• from n=4 to n=3

What is the orbital designation corresponding to the quantum numbers : n=4, l = 2, m=0

• 2s
• 2p
• 4p
• 4d

After filling up the 3p orbital , what kind of orbital must electron occupy?

• a spherically-shaped orbital
• a dumb-bell shaped orbital
• either 4s or 3d orbital
• an orbital of lower energy than 3p

A spectrum containing a series of specific wavelength is a ______spectrum.

• line
• visible
• continuous
• balmer

Iron has a proton number of 26. What is the electronic configuration of Fe²⁺?

• [Ar] 4s² 3d⁶
• [Ar] 3d⁶
• [Ar] 4s² 3d⁴
• [Ar] 4s² 3d⁵

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Determine the frequency of a radiation which has an energy 3.37 x 10^-19 J per photon.

• 6.62 x 10¹⁴ s^-1
• 1.70 x 10¹⁵ s^-1
• 5.08 x 10¹⁴ s^-1
• 2.21 x 10¹⁴ s^-1