Printable worksheet · 2 of 4
Shared electrons and intermolecular forces differ - Paper 2
Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.
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Molecular model: A diagram shows a shared electron pair between two nuclei. Distinguish bonds WITHIN molecules from attractions BETWEEN molecules. All claims concern the supplied ordinary state-change model, not extreme conditions. No heating experiment is requested.
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Check a calculation · Year 5 onward
Use this only when your teacher or adult allows a calculator for the task. Show your thinking first. It does not replace mental or written arithmetic and does not mark your lesson answer.
Powers, roots and trigonometry · Year 7 onward
Use only when the task allows a calculator. Choose one operation at a time and record your working. Trigonometry here always uses degrees (DEG), not radians. Inverse sine, cosine and tangent return an angle, not a reciprocal. Keep exact fractions and π in answers when requested.
Approximate numerical results use up to 12 significant digits. Inverse sine returns −90° to 90°, inverse cosine 0° to 180°, and inverse tangent −90° to 90°; these are principal values, not every possible solution of a trigonometric equation.
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