Lonic Bonding Why did it require two sodium atoms to Complete
the Na 0 formula unit?

Na has +2 charge and O has -1 charge.
Na has +1 charge and O has -2 charge
Na has -2 charge and O has +1 charge.

What neutral atom is isoelectronic to mn+4

What overall charge must all compounds have

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange