Difference between revisions of "Calcium"
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Latest revision as of 10:05, 25 January 2006
1. 흙속에 있는 알칼리성의 금속 성분
2. 원자번호 20
3. 흰색의 가연성 고체이며, 납보다 조금 딱딱하다.
- This page was last edited on 25 January 2006, at 10:05.
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