The time for eople th think about shouwing thanks is____. It is now very common for people to ___ online their thanks to the volunteers. The volunteers working in the library seemed to ___ the staff's silent way to recognize them.
【简答题】【化学--选修物质结构与性质】 X、Y、Z、W是元素周期表前四周期中常见的元素,其相关信息如表: 元素 相关信息 X X原子基态时最外层电子数是其内层电子数的2倍 Y Y原子基态时2p原子轨道上有3个未成对的电子 Z Z的基态电子最外层电子排布式为:ns n np n+2 W W的原子序数为29 (1)基态W原子的价电子排布式是______. (2)X、Y、Z三种元素第一电离能从大到小的顺序是__...