urgent
Asked by pritam | 20th Feb, 2011, 05:20: PM
Expert Answer:
Dear student
Groups are vertical columns while periods are horizontal rows
Group 1,2 and 13 to 18 elements are called representative elements. In these elements the ultimate shell is incompletely filled
Group 3 to 12 are called transition elements
For your boards only learn first 20 elements
Please post ur querries separately
Answered by | 20th Feb, 2011, 09:18: PM
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