Labels:book | bulletin board | earth | encyclical | sky | vegetarianism | window OCR: HE TABLE BELOW shows how to use the atomic number to work out the structures ofelectron shells. For example, the atomic number oflithium soit has three electrons Two electrons occupy the first shell, and one electron occupies the second shell. However this just a guide to some simple atoms; as the atomic num ber increases beyond those shown here the electron shell structures become much more complicated Atomic First Second Third numbet shell shell shell Hydrogen Helium Lithium Carbon Oxygen Neor Sodium Magnesium Silicon Sulfur Argon Because the outermost shell is full, the element is stable and there fore unreactive. electror ydrogen lium Neon agnesium
(.png)
