The number of orbitals in a d subshell is ……….

  The element Rubidium (Rb) is ………..

  Which of the following elements is a non-metal?

The number of valence electrons in Silicon (Si) atom is ……

  An atom of

^𝟕𝟎₃₁𝐆𝐚 contains ………..

 Convert 443 °F into °C.

  Calculate the number of atoms in 15.5 g of Silicon (Si)?

Calculate the number of atoms in 0.500 mol of Lithium?

What is the energy of a photon with a frequency of 3.73 x 1013 s ?

 Calculatethe energy change associated with the transition from n = 4 to

n = 5 in the hydrogen atom.