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I stands for iodine. It is placed in group-17.
Astatine is placed in group-17 in the Periodic Table. Its symbol is At.
Lead is not placed in 1 or 2 group of periodic table, it is in IV-A (14th) group of periodic table, however in the scheme of salt analysis it is placed in ist and 2nd groups of basic radicals.
Periods are placed horizontally in the periodic table of Mendeleev.
Metals are placed on left side of periodic table. They are placed in group-1,2. Few metals are present in group-13 and 14.
I stands for iodine. It is placed in group-17.
Table salt is NaCl, when placed in water. The elements separate into Na+ and Cl-. The + and - ions connect the electrical current.
Actinoids are placed in a separate row under the periodic table.
The table salt solution is neutral.
Astatine is placed in group-17 in the Periodic Table. Its symbol is At.
Metals are placed at the left. Non-metals are placed at right in periodic table.
Compounds are not placed in the periodic table.
If new elements are placed, then they would be appended in the periodic table. It won't disturb existing periodic table.
Lanthanides are placed in a special row under the classical periodic table; but this arrangement is only a convention.
white normally but they can be any color I guess
red
Lanthanides and actinides are placed below the periodic table because of their unique physical and chemical properties.