The first ionization energy of bismuth is ei1 = +703 kj/mol. what is the longest possible wavelength of light that could ionize an atom of bismuth?

Hey there!:

Given, energy, E = 703 kJ/mol

λ = ?

We need to do conversion of kJ/mol to J

So, E = 703 kJ/mol*1000 J*kJ *1 mole / 6.023*10²³

 = 1.17*10-18 J

We know formula,

E = h*C/ λ

So, λ = h*C / E

=  ( 6.626*10-34 J.s ) *  ( 3.0*10⁸ m.s⁻¹ ) /  ( 1.17*10⁻¹⁸ J )

= 1.70*10⁻⁷ m

So, 1 m = 1*10⁹ nm

So, 1.70*10⁻⁷ m = ?

= 170 nm

Hope that helps!

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.