define Modern Periodic Table

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Solution

Dear student,

Modern periodic table is an arrangement of chemical elements based on their atomic numbers, configuration of electron and chemical properties. Modern periodic table is based on the Moseley's periodic law, which states that the properties of elements in the periodic table are periodic functions of their atomic numbers.The modern periodic table consists of four blocks- s,p,d and f. It consists of 18 vertical columns called as groups and 7 horizontal rows called as periods.

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Answer the following:

1. How could the modern periodic table remove various anomalies of Mendeleev’s periodic table?

2. In the modern periodic table, which are the metals, non-metals and metalloids among the first twenty elements?

3. What are the demerits of Mendeleev’s periodic table?

4. Define atomic size. How does it vary in a period and in a group?

Difference between modern periodic table and mendeelev's periodic table.

Explain the merits of modern periodic table?

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