List the merits of long form of the periodic table.
Answers
Answered by
8
) The long form periodic table (IUPAC 1984) consists of 18 vertical columns and 18 groups. These groups are numbered 1 to 18 from the left, using Arabic numerals.
(ii) Elements of the groups 1 and 2 , and groups 13 to 17 are called main group elements. These are also called typical or representative or normal elements.
(iii) The elements of the groups 3 to 12 in the middle of the periodic table are called transition elements.
(iv) Elements with atomic numbers 58 to 71(Ce to Lu) occurring after lanthanum are called lanthanides.
(v) Elements with atomic numbers 90 to 103(Th to Lr) are called actinides.
(vi) Both these series of elements (lanthanides and actinides), are placed in mass separate box atomic the bottom of the periodic table. This is done to avoid excessive width of the periodic table.
(vii) There are seven (7) horizontal rows in this periodic table called periods. Thus, there are seven periods in this periodic table.
(a) First period contains 2 element, and is called shortest period.
(ii) Elements of the groups 1 and 2 , and groups 13 to 17 are called main group elements. These are also called typical or representative or normal elements.
(iii) The elements of the groups 3 to 12 in the middle of the periodic table are called transition elements.
(iv) Elements with atomic numbers 58 to 71(Ce to Lu) occurring after lanthanum are called lanthanides.
(v) Elements with atomic numbers 90 to 103(Th to Lr) are called actinides.
(vi) Both these series of elements (lanthanides and actinides), are placed in mass separate box atomic the bottom of the periodic table. This is done to avoid excessive width of the periodic table.
(vii) There are seven (7) horizontal rows in this periodic table called periods. Thus, there are seven periods in this periodic table.
(a) First period contains 2 element, and is called shortest period.
Answered by
12
1) long form of periodic table is based on atomic numbers which is more fundamental properties of the atom
2) it relates the position of an element in the periodic table with it's electronic configuration
2) it relates the position of an element in the periodic table with it's electronic configuration
Similar questions