what determines the number of neutrons in an atom?

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what determines the number of neutrons in an atom?

what determines the number of neutrons in an atom?
what determines the number of neutrons in an atom?

what determines the number of neutrons in an atom?
1质子数 2保持库仑力和核力的平衡
轻质量的原子中 中字数一般等于质子数
而重核原子中 同样数量的单靠电子和质子间的库仑力无法平衡 所以需要增加中子数目来增强强相互作用 也就是增加核力

what determines the number of neutrons in an atom?
一个原子中的中子数是由什么决定的?

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