Express in scientific notation. choose the answer with the proper number of significant figures. 0.47 x 10^-17 0.5 x 10^-17 5 x 10^-18

Which of the following statements is not true? • a. covalent compounds have low melting and boiling points. • ob. covalent bonds between atoms of a compound are relatively weak compared to bonds between molecules. • c. covalent bonds occur between nonmetals. • d. covalent compounds are often gases or liquids.

Type the letter that represents the correct location for each particle type below.

What is a metal replacement reaction