Who named earth if no one knew what earth was?

The boiling point of liquids is very high what does it indicate

What is the solubility of substance?

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.