The first test you just

read about is for

appearance. if the

substance is a

crystalline solid, as

shown at right, then the

substance is likely

ionic

covalent

Choose all that apply. when creating a graph, you should: determine the x- and y- variables label the scale on the x- and y- axes plot the data points draw a line of best fit to represent the data trend

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

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false