Please refer and do this questions-
https://www.physicsandmathstutor.com/pdf-pages/?pdf=https%3A%2F%2Fpmt.physicsandmathstutor.com%2Fdownload%2FChemistry%2FGCSE%2FTopic-Qs%2FAQA%2F1-Atomic-Structure-and-the-Periodic-Table%2FSet-C%2F1.1%20A%20Simple%20Atomic%20Model%20(F)%20QP.pdf