... organise information clearly– use specialist vocabulary where appropriate.For this paper you must have:● a pencil and a ruler● a calculator● a Data and Formulae Booklet. Physics A PHYA1Unit ... An unstable nucleus, A ZX, can decay by emitting a β–particle.3 (a) (i) What part of the atom is the same as a β–particle? (1 mark)3 (a) (ii) State the changes, if any, in A and Z when ... reserved.(16)(JAN10PHYA101)WMP/Jan10/PHYA1PHYA1Centre NumberSurnameOther NamesCandidate SignatureCandidate NumberGeneral Certificate of EducationAdvanced Subsidiary ExaminationJanuary 2010Time allowed●1 hour...