There is 0 vote topic in this bar.
Content converter: No conversion▼
 
Clicks Replies Title Author Last Reply
No posts
Create a vote
Title:
Content:
Sorry, only old users, bar members and bar administrators are allowed to create votes in this bar. If you have any questions, please contact the bar administrators or give your feedback in the complaint center.
Sorry, only old users, bar members and bar administrators are allowed to create votes in this bar. If you have any questions, please contact the bar administrators or give your feedback in the complaint center.
User: You are currently anonymous.
(Shortcut key: Ctrl+Enter)
Bar Information
Fans: 0
Admins:  None
Members:  会员0

Category: 化學類

File
元素週期表是依原子序数、核外电子排布情况和化学性质的相似性来排列化学元素的表格。一如其名，元素週期表的排列展现元素性质的週期性趋势。其中，週期表的横行被称作週期，纵列则被称作族。一般而言，在同一週期...