Describe the composition and structure of a neutral atom of lithium-7, which has a proton number of 3 and a nucleon number of 7.
A radioactive isotope decays by β\betaβ-emission to form an isotope of nickel with nucleon number 65.
| Element | Symbol | Proton number |
|---|---|---|
| cobalt | Co\text{Co}Co | 27 |
| nickel | Ni\text{Ni}Ni | 28 |
| copper | Cu\text{Cu}Cu | 29 |
| zinc | Zn\text{Zn}Zn | 30 |
| gallium | Ga\text{Ga}Ga | 31 |
| germanium | Ge\text{Ge}Ge | 32 |
Use data from the table to write down the nuclide equation for this decay.
120 exam-style questions on CIE IGCSE Physics 5.2.3a Radioactive decay. Each one has a worked solution and a mark scheme showing where the marks go.