[نادين 1]

مين تشرحها لي ماني فاهمتهم
س\ which of the following is isoelectronic with Ne
1-ca+2
2-+k
3-Na+
4- Ar
ــــــــــــــــــــــــــــــــــــــــــــ
which of the following is the electron configuration for Ti
1-Ar -3d^2
2-Ar-4s^2,,,,,3d^2
3-Ar 4d^2