Question

please help, I don't think im doing this correctly

Re-order each list in the table below, if necessary, so that the atoms or ions in it are listed in order of decreasing size. atoms or ions atoms or ions in order of decreasing size do 0 AI, AI Na Al. Na. A12+ x 5 Sr, Ba, Sr Sr, Sr . Ba Br. Kr, Br 0.0.0

Answer 1

beriodic table. a protons on for each es rectively pulls in the periodic the nucleun. y from Atomic nize decreanen left to right on the periodic t his is because of the attractive force of the protony the same number of rings of electrons increassen for element and we move left to right. This effectively Pi the electrons closer to the nucleuss. Atomic roize increonen moving top to bottom in the per table. This is becaune of the addition of another ring. rectrons to each element and we move from top to both outor electrons can move further away from the nuc Cationis arle 8 maller than their parent atoms and ani. er than their borent atoms. An ite position of Na is left to the bonition of Al on the periodic table, so the size of No iss smaller than the size of all (A2) nimium ionais much smaller than the elementary Aluminium with the loan of two electrono. In this case, we have 13 Protono attracting ll electrono. An arenult, Al2tion will be omallus in nize than the element, which han 13 protono altracting among 13 electrone 4 So, have, Al, Al2t, Na atomo orione in order of decreasing nize will be Na) Al Al 2t • • As the position of Sr is top to the ponition of Ba on the periodic table, so the size of Ba is longer than the nize of Sv. ingize the syht in in much smaller than the elementarry sr atom with the loan of two electrono. In this case, we have 38 protono attracting, 36 electrona As a result sgt ion will be omallet in nite to the Sy Culement which han 38 botono attracting So here among Sr, Ba, Sy24 atoms oriona in org electrona. decreasing size will be Ba) sr) So 24

As the position of Br is left to the ponition of Ky on the periodic table, no the size of Br of in Loriger than the size of kr. The Br-ion is much larger than the elementary Br atom with the gain of one election. In this 35 protons attracto 36 electrons. As a result, the Br-ion will be langer in size than the Br element which has 35 protono attracting 35 electrono. So, here among Br, kr, and Br atomo oriona in order of decreasing size will be Bry Br) kr

Atomy or iono A tomo or long in orders of decreaning nize Al, Al2t, Na Na) Al> 4d 2+ Sr, Ba Ba 2t Basso) sr2t Br, kr, Br Br> Br) kr