Which of the following is an excited-state configuration for neon?

What is the energy of one photon with a wavelength of 0.500 m?

How many valence electrons does P³⁻ have?

What is the maximum number of electrons that can have: n=5, l=0

Calculate the frequency of light with a wavelength of 650 nm.

Give the correct number of significant figures and units: (6.789 L – 0.56 L)/123 g

Which element will display an unusually large jump in ionization energy values between I₃ and I₄?

How many unpaired electrons does an atom of carbon have in its ground state?

Give the correct number of significant figures and units: (3.20 kg – 0.15 kg)/0.015 s

Which two electron configurations represent elements with similar chemical properties? (1) 1s² 2s² 2p¹(2) [Ne] 3s² 3p¹(3) [Ne] 3s² 3p⁵(4) [Ar] 4s² 3d¹⁰ 4p¹