How Do You Know Which Element Has The Highest Electron Affinity? Chlorine has the highest electron affinity while mercury has the lowest. Electron affinity generally increases across a period (row) in the periodic table, due to the filling of the valence shell of the atom. How do you know which element has more electron affinity?
Which Elements Can Have More Than 8 Valence Electrons? Sulfur, phosphorus, silicon, and chlorine are common examples of elements that form an expanded octet. Phosphorus pentachloride Can there be more than 8 valence electrons? Unlike atoms from periods one and two that only have the s and p orbitals (total of 8 valence electrons), atoms
What Are The Exceptions To Electron Affinity? In general, exceptions arise when new subshells are being filled/half-filled, or in cases where the atom is too small. In the first case, Be and Mg are interesting examples: they have a positive electron affinity (just like N, in fact) because of the energy difference between the s
How Do You Determine The Number Of Valence Electrons For Transition Metals? Most transition metals have 2 valence electrons. Valence electrons are the sum total of all the electrons in the highest energy level (principal quantum number n). Most transition metals have an electron configuration that is ns2(nā1)d , so those ns2 electrons are the