Question

ma ajutati pls? dau coroana

Answer 1

X(Z=1)

1s1 grupa I, per.1 ; are 1e- ; 1p+ si 1-1=0 n

B(Z=16)

1s2 2s22p6 3s23p4 grupa aVI-A, per. 3; are 16e-; 16p+; 32-16=16n

D(Z=17)

1s2 2s22p6 3s23p5 grupa a VII-A, per. 3; are 17e-; 17p+ ; 35-17=18 n

Nr. de electroni din orbital => grupa