题目

NameJonathan SmithDate of birthFeb.25，2001Place of birthNew York， NY． the USAContact（联系方式）Address： 37 Greenfield Road， Sydney， AustraliaTelephone：0123 186 225689 E﹣mail：jonathan@myspace．comEducationGED﹣12， including English and mathGreenfield High School, Sydney, AustraliaWork experienceWaiter at Betty's Pizza Restaurant on Saturdays﹣9 months；Volunteer as a judge (裁判) in Greenfield Nursery School sports meeting﹣3 timesLanguagesEnglish﹣first language Chinese﹣second languageSkills & interestsSports, singing, drawing, traveling, gardening【15．短周期主族元素X、Y、Z、M、N的原子序数依次增大．X与M的原子核外最外层电子数是周期数的二倍，Y、Z、M最高价氧化物对应的水化物两两之间能相互反应．下列叙述正确的是（　　）A．元素非金属性由弱到强的顺序：M、N、YB．单质Y的熔点高于单质Z的熔点C．原子最外层电子数由少到多的顺序：Y、Z、X、M、ND．电解N和Z形成的化合物可得到对应的N和Z的单质