# why is lithium oxide so different from water [closed]

Take water and replace hydrogens with the next element down in the periodic table, and you get a white solid, nothing like water. https://en.wikipedia.org/wiki/Lithium_oxide Lithium itself is very different from hydrogen, but it's isoelectronic and only has a few more nucleons. You'd think if there was any sense to this periodic table thing they'd be similar...

• Take water and drop below 0C. You get a often white solid. – Jon Custer Mar 13 at 16:41
• Periodic table only accounts for chemical and some very basic physical properties, it, by no means, takes into consideration the phase in which a compound is which is formed when an element combines with another. – Shivansh J Mar 13 at 18:11

Hydrogen is not isoelectronic to lithium. According to wikipedia, for example, $$\ce{CO, CN−, N2, C2^2-, and NO+}$$ are isoelectronic because they have the same electronic structure. Typically, elements in the same group are not described as isoelectronic (like the noble gases).