Question

Cat mai repede va rog frumos !​

Answer 1

x/y = 3/4

x+10/y-10 = 1/1 => x+10 = y-10

=> x+20 = y

=>

x/(x+20) = 3/4

=> 4x = 3x + 60 <=> x = 60

=> y = x+20 = 80

=> X = Nd (neodim) , Y = Hg (mercur)

Hg, Z = 80

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10

grupa 12 (II-B) ,  perioada 6

Nd, Z = 60

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f4

seria Lantanide , perioada 6