Question

25. The first six ionization energies for the elements X and Y are shown in the table below. Identify possible names or Z numbers for the elements X and Y. Note: ionization energy units are not given, only the relative size of the lonization Energies. Ionization Energy Y first 175 100 395 225 second 3,400 3,900 9,875 12,750 3,625 4,700 10,675 13,500 third fourth fifth sixth

Answer 1

Lonization emrgy / X y 17S Ind 225 395 ILd 3625 34o0 390D 47o0 アカ 9 875 10,675 VITH 3, 500 12, 7S0 By obserwing fhese X and y elomentt duccenive day that habelong to Guou 2 エE fhere elementh hare imization enrgjes in ncreaig rder Cam we nionization energier observe, the A X and y draticly increses beause after 2 electn Greut 2 elemtnt achiere loring oble gar conbigurstion hrith incneese koritive cherye y2t 2e I E X X+2e > due to nokle ga cmbiguration rohich lends to takility

Nour, nemoval fLd elechon eguined high amont nergy Further onizatin energies increser due to ihereae h botitive charge stioization emergip thy hart larger tize are lowo hip thou A the size jncreases, valince election the hucleors end attactire effectin clear cherge decrsaves electon require len energy goer aury m ferce So temoval Ist Ionizatin inegy dYi le han Itjoitin enerty dX do, Y het larzer dize than atom hese elements arl Sr (shmtim) 3e) Ba (Earium Ba (z-56) Z

Radiun iA largest dize element in Grouf 2. Radim jA radioactive element, &o , Radium gucemive nzation enere onider we yjer