Electron config and Line Spectra Qs

Which statements are correct for the emission spectrum of the hydrogen atom?

I. The lines converge at lower energies.

II. Electron transition to n =1 are responsible for lines in the UV region.

III. Lines are produced when electrons move from higher to lower energy levels.

• I and II only

• I and III only

• II and III only

• I, II and III

What is the electron configuration of chromium?

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁴

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d¹⁰

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁹

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁵

What is the noble gas shorthand electron for a sulfur atom?

• [Ar] 3p⁴
• [He] 3s²3p⁴
• [Ne] 3s²3p⁴
• [Na] 3s²3p⁴
  

A wave with a large wavelength will have a ______ frequency and _____ energy

• high, low
• high, high
• low, high
• low, low

Which electron configuration belongs to Chlorine (Cl)?

• 1s² 2s² 2p⁶ 3s² 3p⁵
• 1s² 2s² 2p⁶ 3s² 3p⁶
• 1s² 2s² 2p⁶ 3s² 3p⁷

Which of the following is not a sublevel

• s

• p

• n

• f

• d

What electron configuration matches an oxygen atom?

• 1s²2s²2p⁶3s2, 3p⁶4s²3d¹⁰4p⁵
• 1s²2s²2p⁴
• 1s²2s²2p⁶
• 1s²2s²2p⁶3s²3p⁶4s²3d¹

An orbital can at most hold how many electrons?

• 1 electron
• 2 electrons
• 3 electrons
• 4 electrons

total number of unpaired electrons in an atom of phosphorus

• 1

• 3

• 5

• 9

total number of p orbitals containing at least one electron for Bi

• 2

• 3

• 15

• 27