The formation of negative ions from these elements is difficult dut to electron affinity of these negative ions is near to or less than zero.
这些负离子对应元素的电子亲合势大部分接近或小于零，负离子难以形成。
The formation of negative ions from these elements is difficult dut to electron affinity of these negative ions is near to or less than zero.
这些负离子对应元素的电子亲合势大部分接近或小于零，负离子难以形成。
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