Learn a Short Trick For Electron Configurations Of Elements Filling of Electronic Subshells in Elements Mnemonic: ♥1s ♥2s 2p ♥3s 3p 3d ♥4s 4p 4d 4f ♥5s 5p 5d 5f ♥6s 6p 6d ♥7s 7p The subshells fill diagonally from upper right to lower left in the chart above: ♥First is 1s, then 2s, then 2p and 3s, then 3p and 4s. ♥Next comes 3d, 4p, and 5s. Then comes 4d, 5p, and 6s. ♥After that comes 4f, 5d, 6p, and 7s. Last comes 5f, 6d, and 7p. For an atom with 118 electrons, the electron orbital configuration would be: ♥1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10 7p6 You read also this abot periodic table article * You read also Short tricks For Learn Periodic Table In Easy Way Period 1 To Period 14 by one click * You also read Short tricks For Learn Periodic Table In Easy Way period 15 to 18 with transitonal metal and also with Lanthanide & Actinide elements * Read also We have another way to Learn Periodic table in Hindi Gro...