What would be the proper way to write the name for a compound with the formula nano3?

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

What type of matter is made of only one kind of atom

Awoman's basketball has a circumference between 28.5 and 29.0 inches and a maximum weight of 20 ounces (two significant figures). what are these specifications in units of centimeters and grams?