It is a naked electron and is a sodium positive ion.
它是个裸电子，是钠正离子。
Electron affinity, however, can be either negative or it can be positive.
但是，电子亲和能既可以是负的，也可以是正的。
A proton has positive charge and an electron has negative charge.
质子带正电荷，电子带负电荷。
Positive electron and antiparticle are found.
正电子及反粒子的发现。
An electron has a negative charge, a proton has a positive charge.
电子带负电荷，质子带正电荷。
An electron has a negative charge, a proton has a positive charge.
电子带负电荷，质子带正电荷。
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