BONUS, if you're smarter than a 7th grader: Where exactly is coltan found within the Periodic Table of Elements?

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

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)