The half-life of 131i is 8.021 days. what fraction of a sample of 131i remains after 24.063 days

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.

What does x represent in the formula for the compound xcl4?

What is the equilibrium constant of aa+bb=cc+dd