Chemical bonds

Definition

Chemical bonds are the attractive forces that hold atoms together to form molecules and compounds. These bonds are essential for the structure and function of all biological molecules.

5 Must Know Facts For Your Next Test

1. Chemical bonds can be classified into three main types: ionic, covalent, and hydrogen bonds.
2. Ionic bonds occur when electrons are transferred from one atom to another, resulting in oppositely charged ions.
3. Covalent bonds form when two atoms share one or more pairs of electrons to achieve stability.
4. Hydrogen bonds are weaker than ionic and covalent bonds but play a crucial role in maintaining the structure of DNA and proteins.
5. The type and strength of chemical bonds determine the properties of the resulting molecules, such as solubility, melting point, and reactivity.

Review Questions

• What are the three main types of chemical bonds?
• How do ionic bonds differ from covalent bonds?
• Why are hydrogen bonds important for biological molecules?

Related terms

Ionic Bond: A type of chemical bond where electrons are transferred between atoms, creating ions with opposite charges.

Covalent Bond: A type of chemical bond where two atoms share one or more pairs of electrons.

Hydrogen Bond: A weak bond occurring between a hydrogen atom bonded to a highly electronegative atom (like oxygen or nitrogen) and another electronegative atom.