Five students were looking at a large poster of the periodic table. They noticed the elements were arranged in rows and columns. They also noticed the elements were arranged in order from 1–118. They had different ideas about the arrangement of the elements on the periodic table.

The excretory system,need answers for all: )

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.

The three types is stress that act on earths rocks are compression, tension, and