TÝnh chÊt oxi ho¸ K K + Na Na + Mg Mg 2 + Al Al 3 + cña ion kim lo¹i Zn Zn 2 + Fe Fe 2 + Ni Ni 2 + Sn Sn 2 + t¨ng Pb Pb 2 + 2 H H + Cu Cu 2 + + + 2 3 Fe Fe t¨ng Hg2 Hg 2 2 + Ag Ag + Pt Pt 2 + Au Au 3 + TÝnh chÊt khö cña kim lo¹i gi¶m 1.If/you/eat/candies/ at night/you/have got/a toothache. 2.If/weather/fine/we/ go camping/ tomorrow. 3.He/feel/better/if/he/ take a rest. 4.If/young people/ not/ drive/ carefully/ they/have/accidents. 5.If/you/learn/ hard/ you/get/ good marks. Present.