如題~
我成日都整亂左呢2個既分別
學校既筆記又唔清唔楚
希望明白既人幫我解下答
物理/化學性質and物理/化學變化
2006-11-27 3:59 am
回答 (3)
2006-11-28 12:31 am
✔ 最佳答案
如氯化鈉(食鹽)物理變化是指氯化鈉加入到水時,只是氯化鈉改變了形態,沒有新的物質生成。
我們不妨舉例說明:就如 鉀 (K)
化學性質是關於到最外層的電子數目: (化學變化)
鉀的最外層電子數為:2,8,8,1 。它是第4週期的第| 族種很活躍的金屬元素。它與水會產生化學變化生成鹼液和氫氣,有新的物質生成。但是K+則不會與任何物質元素產生化學變化。
2006-11-29 5:44 am
我讀英中,只識英文去答
自己拾生
Chemical change:
new substances with different compositions&properties are formed
large quantities of energy begin absorbed or released [usually in the form of:light, heat, or electricity]
Physical change:
do not involve the changes in composition
generally involve small amount of energy begin absorb or release
eg:changing of state
自己拾生
Chemical change:
new substances with different compositions&properties are formed
large quantities of energy begin absorbed or released [usually in the form of:light, heat, or electricity]
Physical change:
do not involve the changes in composition
generally involve small amount of energy begin absorb or release
eg:changing of state
參考: Chemistry a modern view
2006-11-27 4:57 am
物理變化 係冇新物質產生
化學變化 有新物質產生而且有能量釋放
化學變化 有新物質產生而且有能量釋放
收錄日期: 2021-04-12 19:40:13
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061126000051KK05170