Practical Electron Microscopy and Database

Chapter/Index: Introduction | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Appendix

4S Elements in Periodic Table

Table 4706a. 4s elements in periodic table.   Table 4706b. Electron configurations, filling orbitals, and valence electrons of 4s elements Atomic Number Symbol Name Electron Configuration Filling Orbital Valence Electrons 19 K Potassium  1s2 2s2p6 3s2p6 4s1  4s1  4s1  20 Ca Calcium  1s2 2s2p6 3s2p6 4s2  4s2 4s2 Figure 4706 shows the relation between electron binding energies and atomic number (Z). Figure 4706. Relation between electron binding energies and atomic number (Z) (at low binding energies).