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CAIE IGCSE Chemistry 2.5.2 Formation of Covalent Bonds in Simple Questions

Use shared electron pairs and dot-and-cross diagrams to represent covalent molecules and count their bonds.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • complete dot-and-cross diagrams for covalent molecules
  • count shared and non-bonding electron pairs
  • deduce molecular structure from covalent bonding
  • count covalent bonds in a molecule
  • identify single, double and triple covalent bonds

CAIE IGCSE Chemistry 2.5.2 Formation of Covalent Bonds in Simple Questions question 1

[Maximum number: 2]

This question is about the elements sodium and fluorine and the compound sodium fluoride.

Some properties of sodium, fluorine and sodium fluoride are shown in Table 3.1.

Table 3.1

Table 3.1

Complete the dot-and-cross diagram in Fig. 3.1 of a molecule of fluorine.

Show outer shell electrons only.

Fig. 3.1

Fig. 3.1

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