Question

2. What is periodic table?.​

Answer 1

Answer:

Periodic table is a chart of elements prepared in such a way that elements having similar properties occur in same vertical groups. According to Mendeleev's periodic law, Properties of elements are periodic functions of their atomic masses. In this, there are seven periods and eight groups.

Explanation:

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Answer 2

Answer:

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The periodic table, also known as the periodic table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties. ... The columns, called groups, contain elements with similar chemical behaviours.