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chemistry igcse acapprinted 49 · PDF 49
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• C has 4 electrons in its outer-shell and each H atom has 1 electron in their
outer shell. C shares its 4 electrons with four separate H atoms, thus allowing C
to complete its octet shell (shell with 8 electrons), and each H atom its duplet
shell (shell with 2 electrons). This forms C, with a stable electronic
configuration.
Examples of covalent bonds