Q is a non-metal with four electrons in its outer shell. A chlorine atom has seven electrons in its outer shell. In a molecule of QCl4\mathrm{QCl_{4}}QCl4, each chlorine atom is joined to Q by a covalent bond. A student makes this statement about a dot and cross diagram of one molecule of QCl4\mathrm{QCl_{4}}QCl4, showing outer shell electrons only: 'The molecule contains 4 shared electrons, and each chlorine atom has 7 outer electrons that are not used in bonding.'
Is the student correct? Explain your answer.
122 exam-style questions on OCR GCSE Chemistry 2.2 Bonding, covering 2.2.1 Metals, non-metals and the Periodic Table, 2.2.2 Types of chemical bonding and dot and cross diagrams, 2.2.3 Limitations of bonding models, and 2.2.4 Reactivity, atomic number and the modern Periodic Table. Each one has a worked solution and a mark scheme showing where the marks go.