Use words from the box to complete the sentences below about ion formation.
| inner | gaining | losing | outer | sharing |
Atoms can form negative ions by .................... electrons.
These incoming electrons are added to the .................... shell of the atom.
81 exam-style questions on Edexcel GCSE Physics 6.1 Atomic structure and isotopes. Each one has a worked solution and a mark scheme showing where the marks go.