Please help ! chemistry graph

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.

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

Identify the electromagnets with poles that are reversed from the electromagnet shown above