جميع المواضيع المتعلقة بـ ‘actinides’

 

Long form or Modern form of periodic table

Long form or Modern form of periodic table

The modem form of period table is based on increasing order of atomic number. General features of the table is as follows:

1 –  There are 18 vertical columns which arc called groups. They are numbered in the old form by IA, IB, IIA, IIB, … VIIA, VIIB VIII and 0 (zero) and in the new…

كلمات دليلية: , , , , , , ,