The elements in a row of the periodic table *
O are in the same family-
O have the same or nearly the same properties
O have the same average atomic mass.
O have properties that change in a pattem.

In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to right

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

Which is true of a liquid? it has a definite volume but not a definite mass.it has a definite mass but not a definite volume.it has a definite volume but not a definite shape.it has a definite shape but not a definite volume.