题目

（8分） W、X、Y、Z是周期表前36号元素中的四种常见元素,其原子序数依次增大。W、Y的氧化物是导致酸雨的主要物质,X的基态原子核外有7个原子轨道填充了电子,Z能形成红色(或砖红色)的Z2O和黑色的ZO两种氧化物。(1)W在元素周期表中的位置                。W的气态氢化物稳定性比H2O(g)______(填“强”或“弱”)。(2) Y的最高价氧化物对应水化物的浓溶液与Z的单质反应的化学方程式是_____________。(3) 已知下列数据:Fe(s)+O2(g)====FeO(s) ΔH= —272.0kJ·mol-1  2X方框中选择恰当的短语完成句子in the sight   in front of   introduce yourself   in public  plenty of  get along with　　think about　　in the front of(1)Noise outside the classroom doesn’t bother him _______．(2)There were some big trees _________ the teaching building before．(3)________ good friends are helpful for us．(4)Don’t smoke ________!(5)Did you _________ your new classmates?(6)__________ to us before giving a speech．(7)We can see a big teaching desk ______ the classroom．(8)Before doing we should ________ what will happen．