A.x=y+n+m | B.x=y+n–m | C.x=y–n–m | D.x=y–n+m |
A.原子半径Na>K | B.与稀盐酸反应剧烈程度:K>Na |
C.还原性Na>K | D.碱性NaOH>KOH |
A.熔沸点:F2<Cl2<Br2<I2 | B.颜色:F2、Cl2、Br2、I2逐渐加深 |
C.还原性: F―>Cl―>Br―>I― | D.热稳定性:HF>HCl>HBr>HI |
A.原子半径:X>Y>Z>W | B.原子序数:Y>X>Z>W |
C.原子最外层电子数:Z>W>Y>X | D.还原性:X>Y,W2―>Z― |
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