What types of waves are produced by a jackhammer?

Covalent network solids typically have melting points and boiling points. the chemical formula of a network solid indicates in the molecule.

If the element whose electric configuration ends in the d sublevel, the element is calssified as? a.inner transition b.noble gases c.representative d. transition

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.