Fair Go Casino Australia: Your go-to destination for sports betting and rewards
2 Views0 Comments0 Likes
Fair Go Casino Australia offers an exceptional online gaming experience tailored for Australian players. With a diverse selection of pokies, live dealer games, and sports betting options, players can enjoy the thr...
Fast Withdrawal Casinos Canada: How to claim your welcome bonuses for more fun
3 Views0 Comments0 Likes
In the ever-evolving world of online gaming, Canadian players are increasingly drawn to fast withdrawal casinos. These platforms not only provide thrilling gameplay but also ensure that players can enjoy their win...
Your guide to fast withdrawals at Neosurf Casinos Australia: Tips for seamless cashouts
5 Views0 Comments0 Likes
Fast withdrawals are a crucial aspect of the online casino experience, especially for players who want immediate access to their winnings. In the realm of online gambling, Neosurf casinos in Australia stand out fo...
Discover real money slots at Online Pokies NZ: Exciting bonuses and fast payouts await
4 Views0 Comments0 Likes
The world of online casinos has transformed the way players experience gaming, especially through real money slots. With an abundance of options, New Zealand players can enjoy various thrilling games accompanied b...

优点:1、故事导入钠和水反应,吸引学生的兴趣。利用钠的保存引出钠的取用方法。
2、实验视频配合合适的讲解。
3、在化学性质讲解中补充物理性质。
缺点:学生的回答可能不会完全使用化学语言,在预设回答时最好考虑到学生的表达能力。
优点:1、故事导入钠和水反应,吸引学生的兴趣。利用钠的保存引出钠的取用方法。
2、实验视频配合合适的讲解。
3、在化学性质讲解中补充物理性质。
缺点:学生的回答可能不会完全使用化学语言,在预设回答时最好考虑到学生的表达能力。影片中的煤油为什么是黄色的没有作出解释。
优点:1.利用熟悉的影视片段,让学生感受到钠的活泼性及保存方式;2.、通过观看实验视频,让同学直观的感受到实验现象,并引出钠的取用、回收、与氧气的反应等;3.从结构分析钠对还原性,体现了“结构决定性质”;4。从氧化还原角度分析钠与氧气的反应,并利用双线桥法,对关于氧化还原反应作回顾,又能让学生从氧化还原角度理解钠的还原性
缺点:对于引用的影视片段中,好像装有钠的试剂瓶中不是煤油,而是某种黄色物质;以及反应现象,这点可以向学生解释一下;
优点:1.利用影视片段导入,让学生感受到钠的活泼性,注意钠的保存方式;
2.通过观看实验视频,让同学感受到实验现象,在看视频之前预设问题;
3.从原子结构示意图中钠的还原性,体现了“结构决定性质”;
4.通过铁和氧气在不同条件下反应产物不同,引导学生思考钠和氧气不同条件反应产物是否是不同的,然后用实验加以验证
5.从氧化还原角度分析钠与氧气的反应,并利用双线桥法;
缺点:好像问题有点多,为什么出境有点多
优点:1、用电视剧导入钠和水反应,吸引学生的兴趣
2、实验视频配合合适的讲解,使同学们更深入理解
缺点:要考虑学生的已知,影片中存在错误现象及操作,可以及时指出或让同学们发现