A covalent bond forms when atoms share [ ].
four outer electrons
a pair of electrons
a pair of protons
one electron shell
Flashcards for CIE IGCSE Chemistry Giant covalent structures, covering the key terms, formulae and methods you need to recall for Paper 1 and Paper 3 (Core) or Paper 2 and Paper 4 (Extended), plus Paper 5 or Paper 6. 20 cards, matched to the CIE IGCSE Chemistry (0620) specification.