∵|-16|=16,|-27|=27,且27>16;
∴-27<-16.
在第二周期中,B、C、N、O四种元素的第一电离能由大到小的排列顺序正确的是
A.I1(N)>I1(C)>I1(O)>I1(B)
B.I1(N)>I1(O)>I1(B)>I1(C)
C.I1(N)>I1(O)>I1(C)>I1(B)
D.I1(O)>I1(N)>I1(C)>I1(B)
Which project management process group normally takes the MOST project time and resources
A.Plannin
B.Desig
C.Integratio
D.Executio