[填空题]
The atom of element X has a mass7sws9z uj-, en.tk hs;+fc4b nuzy*f; nz2wg// -ntzey d: /p54 rsvypuumber of 127 and has 74 neutrons. The ion derived from X hz:pudn/-5vpe/ s4ty2/ r ywzg as 54 electrons.
1.Calculate the number of protons of element X.
2.State the nuclear symbol of the ion formed (refer to the periodic table).
3.An isotope of X has a mass number of 132. Determine the number of neutrons in its atom. neutrons
