1. ...AVAVIAVIIA2 He4.00323 Li6.9414 Be9.0125 B10.816 C12.017...元素周期表是学习和研究化学的重要工具.下表是1-3周期元素的部分信息:族周期IA011 H1.008IIAIIIAIV AVAVIAVIIA2 He4.00323 Li6.9414 Be9.0125 B10.816 ...
2. 5602 (From 5602 To 5628) ALLERTON DR , AMES, IA 50014What's 50014-2217? 50014-2217是5602 (From 5602 To 5628) ALLERTON DR , AMES, IA, USA的5加4位邮编。下面是详细信息。
3. ...AVAVIAVIIA2 He4.00323 Li6.9414 Be9.0125 B10.816 C12.017...根据下表信息回答:族周期IA011 H1.008IIAIIIAIV AVAVIAVIIA2 He4.00323 Li6.9414 Be9.0125 B10.816 C12.017 N14.018 O16.009 F19.0010 Ne20.183Z(1...
4. ...ⅡAⅢAⅣAVAⅥAⅦA2He4.003二3Li6.9414Be9.0125B10.816C12.017...解答:解:(1)11号元素为钠元素,元素符号为Na;C元素的相对原子质量为12.01; (2)相对原子质量为24.31的元素是金属镁,Ne的最外层电子数是8故化学性质不活泼,F元素最外层电子数为7; ...
5. ...H1.0082 He4.0033 Li6.944 Be9.0125 B10.816 C12.017 N14.018...IA ⅡA ⅢA ⅣA ⅤA ⅥA ⅦA 0 1 H 1.008 2 He 4.003 3 Li 6.94 4 Be 9.012 5 B 10.81 6 C 12.01 7 N 14.01 8 O 16.00 9 F ...
6. ...003二3Li6,9414Be9,0125B10,816C12,017N14,018O16,009F19,0010... (1)根据元素周期表可查得16号元素的元素符号; 根据在原子中,原子序数=质子数=核电荷数=核外电子数,进行解答; (2)根据元素周期表查出8号元素和13号元素,依据化合价,利用十字交叉法写出组成的...
7. ...ⅡAⅢAⅣAVAⅥAⅦA2He4.00323Li6.9414Be9.0125B10.8l6C12.017...族周期 IA 0 1 1 H1.008 ⅡA ⅢA ⅣA V A ⅥA ⅦA 2 He4.003 2 3 Li6.941 4 Be9.012 5 B10.8l 6 C12.01 7 N14.0l 8 O16.00 9 ...