السؤال 24

A student treats the detached actinide line as an eighth row. Which placement fixes this groups-and-periods error?

It belongs within period 7.الإجابة الصحيحة
It belongs within period 6.
It forms period 8.
It has no period assignment.

الشرح

The actinides are part of period 7, although they are commonly printed beneath the main table. Assigning them to an eighth period mistakes page layout for the table's actual structure.

الشرح

تابع هذا الاختبار