Saved Bookmarks
| 1. |
Answer the following questions regarding Mendeleev’s modified Periodic Table. (i) How many periods are there in Mendeleev’s Periodic Table? (ii) How many groups are there in Mendeleev’s Periodic Table? (iii) How many groups consist of normal elements and transitional elements in Mendeleev’s Periodic Table? (iv) Which group of elements was missing from Mendeleev’s original Periodic Table? (v) What is the number of first and last vertical column? |
|
Answer» (i) There are seven periods in Periodic Table. (ii) There are nine groups, numbered from 0 to 8. (iii) The groups IA, IIA, IIIA. IVA, VA, VIA and VILA consist normal elements and groups, IIIB, IVB, VB, VIB, VIIB and IB, IIB consist transition elements. (iv) Zero group (Noble gases). (v) The first column is numbered zero, whereas last group is numbered 8. |
|