... kim loại kiềm Câu 1. Chn th t gim dn hot ng hoỏ hc ca cỏc kim loi kim: A. Li - Na - K - Rb - Cs B. Na - K - Cs - Rb - Li C. Cs ... Na D. K Cõu 7. Cho 14,0 gam hn hp X gm 2 kim loi kim thuc 2 chu k k tip nhau vo nc (d) thu c khớ H2 vdung dch cú cha 19,1 gam cht tan. Vy 2 kim loi kim l: (Cho H = 1; O = 16 Li = 7; Na = 23; ... Cõu 5. Cho m gam kim loi kim vo 200 ml dd FeSO4 0,4M thu c 2,24 lớt H2(ktc).Tớnh khi lng kt ta thuc sau phn ng.A. 8,1 gam B. 9,0 gam C. 7,2 gam D. 6,3 gam Câu 6. Cho m gam kim loi M vo nc...