In an oxygen element, each oxygen atom contains eight electrons in its valence shell. the atoms will be

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

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

Name the intersection of plane bpq and plane cpq.