The organized array of all the chemical elements in the increasing atomic number order is known as the periodic table. This periodic table is arranged in a table arrangement whereas rows are known as periods and columns are arranged and known as a group. In the periodic table, the elements are arranged from top to bottom and left to right.
- The elements in the same group will have the same valence electrons and also they have the same chemical properties.
- The elements of the same period will have the increasing order of their valence electrons.
- If the energy levels of the elements increase so the sublevels per energy level also increase.
- The 1st 94 elements of the periodic tables are natural while the rest of them have been synthesized in labs (95 to 118).
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