GCSE · Standard form

Standard form in contextExam-style questions

How standard-form arithmetic solves real scale problems — distances, masses, populations — and why unit conversion has to happen before the powers of ten can do their work.

Start practising Read the lesson

19 questions · GCSE (Higher) level · mark scheme and worked solution on each · no sign-up to try

DifficultyAllLevel 1Level 2Level 3Level 4Level 5
  1. 1
    The mass of a hydrogen atom is 1.67×10−271.67 \times 10^{-27} kg.

    (a) Work out the number of hydrogen atoms in 11 gram of hydrogen. Give your answer in standard form correct to 3 significant figures. [3]

    (b) Write your answer to part (a) correct to 1 significant figure. [1]
    Level 3 · 4 marksTry it