In ranking the hardness of solids, the order of hardness according to the type of bonding and the bond strength is
a) covalent, ionic, metallic.
b) ionic, metallic, covalent.
c) ionic, covalent, metallic.
d) metallic, ionic, covalent.

Why learning about people and places around is important?

The form the boundary between north and south china. a. himalayan mountains c. change river b. xi river d. qinling shandi mountains

Which of the following statements is true about social anxiety disorder? social anxiety disorder tends to develop in early adulthood. social anxiety disorder often co-occurs with mood disorders and other anxiety disorders. social anxiety disorder is relatively rare, with a lifetime prevalence of about three percent in the united states. lesser than 30 percent of adults with social anxiety disorder report humiliating experiences that contributed to their symptoms.