化学元素周期表前二十个及符号

2025-01-22 21:39:15
推荐回答(5个)
回答1:

。。氢(H)
。。氦(He)
。。锂(Li)
。。铍(Be)
。。硼(B)
。。碳(C)
。。氮(N)
。。氧(O)
。。氟(F)
。。氖(Ne)
。。钠(Na)
。。镁(Mg)
。。铝(Al)
。。硅(Si)
。。硫(S)
。。氯(Cl)
。。氩(Ar)
。。钾(K)
。。钙(Ca)

。。。望采纳

回答2:

  1. 氢(H)

  2. 氦(He)

  3. 锂(Li)

  4. 铍(Be)

  5. 硼(B)

  6. 碳(C)

  7. 氮(N)

  8. 氧(O)

  9. 氟(F)

  10. 氖(Ne)

  11. 钠(Na)

  12. 镁(Mg)

  13. 铝(Al)

  14. 硅(Si)

  15. 磷(P)

  16. 硫(S)

  17. 氯(Cl)

  18. 氩(Ar)

  19. 钾(K)

  20. 钙(Ca)

  1. 还原性;Li

  2. 氧化性:Li>Na>K>Rb>Cs;

  3. 碱金属元素能与水或氧气反应生成碱或碱性氧化物;

  4. 氢本来不是碱金属,但因为在IA族,所以归入此表。

化合价记忆

一价氢氯钾钠银 二价氧钙钡镁锌

三铝四硅五价磷 二三铁、二四碳

一至五价都有氮 铜汞二价最常见

正一铜氢钾钠银 正二铜镁钙钡锌

三铝四硅四六硫 二四五氮三五磷

一五七氯二三铁 二四六七锰为正

碳有正四与正二 再把负价牢记心

负一溴碘与氟氯 负二氧硫三氮磷

正一氢银和钾钠 正二钙镁钡锌汞和铜

铝正三 硅正四 亚铁正二铁正三

氯在最后负一价 氧硫最后负二价

莫忘单质价为零

钾钠银氢正一价  钙镁钡锌正二价

氟氯溴碘负一价 铜正一正二铝正三

铁有正二和正三 通常氧为负二价

莫忘单质为零价

回答3:

氢氦锂铍硼 碳氮氧氟氖 钠镁铝硅磷 硫氯氩钾钙
H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca

回答4:

少一个

回答5:

磷 P

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