Read More
Date: 20-5-2020
1053
Date: 25-6-2020
847
Date: 18-6-2019
916
|
Figure 1: Periodic Trend in atomic radii
Vertical Trend
The radius of atoms increases as you go down a certain group.
Horizontal Trend
The size of an atom will decrease as you move from left to the right of a period.
EXCEPTIONS: Because the electrons added in the transition elements are added in the inner electron shell and at the same time, the outer shell remains constant, the nucleus attracts the electrons inward. The electron configuration of the transition metals explains this phenomenon. This is why Ga is the same size as its preceding atom and why Sb is slightly bigger than Sn.
|
|
هذا ما يفعله فيروس كورونا بجذع الدماغ الذي "يتحكم في الحياة"
|
|
|
|
|
تسارع نمو قدرة طاقة الرياح في العالم.. وهذه أكبر 6 دول
|
|
|
|
|
العتبة العلوية المقدسة تقيم ندوة علمية في محافظة البصرة حول مكانة النبي محمد (ص) في القرآن الكريم
|
|
|