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प्रश्न
How many periods and groups are there in the modern periodic table?
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उत्तर
Eighteen groups and seven periods
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संबंधित प्रश्न
Fill in the following blank with suitable word:
Group 17 elements are known as ...............
How does the chemical reactivity of the halogens vary on going in group 17 of the periodic table?
In what respects do the properties of group 1 elements differ from those of group 17 elements? Explain with examples by taking one element from each group.
Name the scientist who stated the modern periodic law.
Answer the following question.
How it can be proved that the basic structure of the Modern Periodic Table is based on the electronic configuration of atoms of different elements?
Give the symbol and valency of the following element and radical.
Hydroxide
Write an Explanation.
Period
What are groups and periods in the modern periodic table?
Identify gas A in the following experiment.
Group 16 elements are collectively called as ______.
