How many orbitals are found in the 5f sublevel

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.

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?