1What is a covalent bond? Give one example.
2Why can two nonmetal atoms not transfer electrons to each other?
3Explain, with a diagram, how a molecule of hydrogen chloride is formed.
4Why is water called a covalent compound? Describe how its molecule forms.
5How is a methane molecule formed? How many covalent bonds does it have?
6Explain how an ammonia molecule is formed.
7Write four characteristics of covalent compounds.
8Write two differences between an electrovalent bond and a covalent bond.
9Why does hydrogen always form only one bond in a molecule?