[题目]组成原子核的粒子是( )A．带正电的质子和带负电的电子B．带正电的质子和不带电的中子C．带正电的质子.带负电的电子和不带电的中子D．带负电的电子和不带电的中子题目和参考答案——青夏教育精英家教网—

题目内容

【题目】组成原子核的粒子是（）

A．带正电的质子和带负电的电子

B．带正电的质子和不带电的中子

C．带正电的质子、带负电的电子和不带电的中子

D．带负电的电子和不带电的中子

【答案】B

【解析】

试题分析：原子由带正电的原子核和核外带负电的电子构成，原子核是由带正电的质子和不带电的中子构成的．

解：在原子中心有个很小的核叫原子核，它由带正电的质子不带电的中子构成，故B正确．

故选B．

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