positive group dynamics

The position of hydrogen was not correctly defined. It was placed in Group I although its properties resembled both the Group I elements (the alkali metals) and the group VII elements (the halogens..

Once an organism is identified and grouped, it is then described in terms of the various taxonomic categories to which it belongs. Such a description is known as systematic position . The following is a description of the systematic position of human being and the hibi..

. Three regions can be recognised in the body, namely a head, a thorax and an abdomen. The head is a region formed by the fusion of six embryonic segments covered by very hard exoskeletal plates called sclerites. The head is triangular in shape and it is held at right angles to rest of the body. Th..

The position of hydrogen is not correctly defined. It is still not certain whether to place hydrogen in group I A or VII ..

1.Chlorine is placed second after fluorine in group VIIA. 2. Other members of this group are fluorine, bromine, iodine and astatine (the last member is radioactive..

Position of Hydrogen in the Periodic Table - Hydrogen is the first element of the periodic table. Its atomic number is 1, which indicates the presence of only one electron in the atom of hydrogen. This electron is present in its first shell. Hydrogen resembles both alkali metals (gro..

Position of Chlorine in the Periodic Table - 1.Chlorine is placed second after fluorine in group VIIA. 2. Other members of this group are fluorine, bromine, iodine and astatine (the last member is radioactive). 3. Members of this group are called 'halogens' m..

The position of an element in the periodic table is generally determined by its electronic configuration e.g. electronic configuration of sodium is 2, 8, 1 i.e., it has three shells and one electron in the outermost shell. Hence, it is placed in period number 3 and group number ..

The third resonance structure (C) has all atoms with their full quota of electrons (closed shell structure) and thus is more stable and more important contribution to the resonance hybrid than the second structure (B) in which the positively charged carbon atom has only six electrons in i..

Since carbon and oxygen have different values of electronegativity, the bond between carbon and oxygen is polar. The electron density around the oxygen atom is increased which causes the development of partial positive charge ( d +) on carbon and a partial negative charge ( d -) on oxygen..