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प्रश्न
Elements in the modern periodic table are arranged in ______groups and______ periods.
पर्याय
7, 18
18, 7
17, 8
8, 17
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उत्तर
Elements in the modern periodic table are arranged in 18 groups and 7 periods.
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संबंधित प्रश्न
Compare and contrast the arrangement of elements in Mendeleev’s periodic Table and the Modern Periodic Table.
Write the merits of the modern periodic table over Mendeleev’s Periodic table
What are horizontal rows and vertical columns in a periodic table known as?
Give the symbol and valency of the following element and radical.
Bisulphite
Give the symbol and valency of the following element and radical.
Carbonate
An X element with atomic number 11 and Y element with atomic number 13 belongs to the third period in the modern periodic table. With this information, give the answers of the below questions.
- Which element has more metallic character from these two elements?
- What is the valency of each X and Y elements?
- Atom size of Y element is smaller than atom size of X element. Explain.
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has variable valency and is a member of the Oxygen family (group 16).
Name two elements that you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
