Mendeleev periodic table
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Answered by
59
Hey there !!!
Mendeleev's periodic table:
1)It is based on atomic weights.
2)Mendeleev's periodic law:The physical and chemical properties are periodic function of their atomic weights
.
3)Only 63 elements were known at that time.
4)It has 8 vertical columns called groups .
5)7 horizontal rows known as periods.
6)Order of atomic weights was changed at places to justify properties of an element.
7)It had vacant places which were discovered later.
Example: eka aluminium (gallium), eka silicon ( germanium)
Hope this helped you !!!
Mendeleev's periodic table:
1)It is based on atomic weights.
2)Mendeleev's periodic law:The physical and chemical properties are periodic function of their atomic weights
.
3)Only 63 elements were known at that time.
4)It has 8 vertical columns called groups .
5)7 horizontal rows known as periods.
6)Order of atomic weights was changed at places to justify properties of an element.
7)It had vacant places which were discovered later.
Example: eka aluminium (gallium), eka silicon ( germanium)
Hope this helped you !!!
Answered by
23
::::::::MENDELEEF's PERIODIC Table::::::::::
→ IT is based on the principle that , if atoms are arranged in the increasing order of their weight , after a regular interval , the periodic properties are repeated .
e.g
" physical and chemical properties of atoms are periodic function of their atomic weight ."
→ It contains 8 vertical ( group) and 12 horizontal ( period ) rows . Zero group elements were not known during that time . it is made of 63 elements .
★ As we know that periodic table was first of all ,proposed by Mendenleef on the basis of atomic weight .After it's it was modified three times .the very first modification done by Mendeleef itself and he proposed the table with 9 GROUPS ( named from zero to VIII ) and 12 PERIODS ( named from 1 to 12)
→ IT is based on the principle that , if atoms are arranged in the increasing order of their weight , after a regular interval , the periodic properties are repeated .
e.g
" physical and chemical properties of atoms are periodic function of their atomic weight ."
→ It contains 8 vertical ( group) and 12 horizontal ( period ) rows . Zero group elements were not known during that time . it is made of 63 elements .
★ As we know that periodic table was first of all ,proposed by Mendenleef on the basis of atomic weight .After it's it was modified three times .the very first modification done by Mendeleef itself and he proposed the table with 9 GROUPS ( named from zero to VIII ) and 12 PERIODS ( named from 1 to 12)
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