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Question		Answer
What does a dot and cross diagram show? start learning		The arrangement and transfer of outer-shell electrons.
Why are brackets used around ions in dot and cross diagrams? start learning		To show they are charged ions.
Explain how sodium chloride forms. start learning		Sodium transfers one electron to chlorine. Sodium becomes Na⁺ and chlorine becomes Cl⁻. The oppositely charged ions attract, forming an ionic bond.
Explain why magnesium forms Mg²⁺ ions. start learning		Magnesium loses two electrons to achieve a full outer shell.
What does each line in a displayed formula represent? start learning		One shared pair of electrons.
What does a displayed formula show? start learning		Atoms and covalent bonds as lines.

Chemistry - Dot & Cross Diagram