Na2O is basic oxide while ZnO is amphoteric. Give reason.

Na2O is a basic oxide because all the metals that form compound with Oxygen or H2O than the compound formed are basic in nature. Every metal oxide or hydroxide is basic in nature.

Zinc oxide is amphoteric because it reacts with both acids and bases to form salts.

sodium (na), for example, has one electron in its valence shell. this is an unstable state because that valence shell needs eight electrons to be full. in order to fill its valence shell, find a way to add seven electrons to its valence shell

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.