The bond formed when two or more atoms complete their electron shells by sharing electrons is called_____________?
Correct answer: C. Covalent bond
- A. Ionic bond
- B. Hydrogen bond
- C. Covalent bond
- D. Electrovalent bond
Explanation
A covalent bond forms when atoms share one or more pairs of electrons to complete or stabilize their outer electron shells. Ionic or electrovalent bonds form through transfer of electrons and subsequent attraction between ions, not sharing. Students may choose ionic bond because both bond types help atoms achieve stable electron arrangements, but their mechanisms differ.
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About Classification of Biological Molecules
Biological molecules are classified as carbohydrates, lipids, proteins and nucleic acids, with water, minerals and vitamins also supporting cellular processes. The key distinctions involve their monomers, chemical bonds, structures and functions, including glucose and starch, fatty acids and triglycerides, amino acids and polypeptides, and nucleotides in DNA and RNA.
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