One electron has a mass of 9.1 × 10-31 grams.
Find the mass of 250 of electrons.
Practise Edexcel IGCSE Maths Standard Form with exam-style questions for IGCSE Maths. 23 questions, matched to the Edexcel IGCSE Maths (4MA1) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.