Examine the block from the periodic table for the element nitrogen, chemical symbol n. using your knowledge of the periodic table, which of these statements is correct about nitrogen?
a) all nitrogen atoms have 7 protons.
b) the mass number of nitrogen is 21.
c) all nitrogen atoms have 14 protons.
d) nitrogen atom has more protons than a fluorine anion.
eliminate

The answer is fossil fuels.

Van der waals forces are temporary electromagnetic forces established between uncharged atoms. some neutral molecules, when close together, can become temporarily “charged,” as electrons move around the atom. water is a polar molecule, the side of the molecule that the hydrogens bond to being more positive, and the opposite side bound to the lone pairs of electrons being more negative. this means that it participates in dipole-dipole interaction (non-polar exhibits dispersion forces), and it has the capacity for hydrogen bonding.