: D0 e8 H; h4 T2 g; X1 z9 N第九题化学英语题, Z. w. T- r) j; s2 D5 v1 k, V(欢迎访问avcar:https://avcar.vip)
What is always correct about the molecular ion, M+, in a mass spectrum of a compound?% L x, P+ g% p0 H! H0 |5 k(欢迎访问avcar:https://avcar.vip)
A. The M+ ion peak has the smallest m/z ratio in the mass spectrum. 5 h5 A7 n1 q# n" C3 Q8 l+ T+ aB. The m/z ratio of the M+ ion peak gives the relative molecular mass of the molecule. & s6 h+ V3 G- B( `- w8 m, z8 k2 RC. The M+ ion is the most stable fragment formed during electron bombardment. : z( V+ b, k! I% eD. The M+ ion peak has the greatest intensity in the mass spectrum.9 x, d% i8 e9 x" z9 I(欢迎访问avcar:https://avcar.vip)
! a5 D+ H" ~, ^) J! f3 \- l(欢迎访问avcar:https://avcar.vip)
第十题采矿学 6 T& Y* h- x5 B" D/ v根据所含金属种类不同,金属矿石可分为:______、 ______、 ______、______、和______。