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प्रश्न
How many groups and periods does the modern periodic table have?
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उत्तर
The modern periodic table consists of seven horizontal rows and eighteen vertical columns.
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संबंधित प्रश्न
Fill in the following blank with suitable word:
Group 17 elements are known as ...............
Correct the statement.
Copper and zinc are representative elements.
Name the type of elements which have two electrons in the outermost orbit.
How will the tendency to gain electrons change as we go from left to right across a period? Why?
Give the chemical formula of sodium nitrate
State the number of elements in Period 2 of the Periodic Table.
On moving from left to right in a period in the periodic table, the size of the atom ______
In the modern periodic table, elements are arranged according to their ______
- Write the electronic configuration of element X, given by its symbol as under: \[\ce{^40_20 X}\]
- Determine its position in the modem periodic table.
- What is the nature of its oxide?
- Name one other element of its group.
An element ‘M' has 50% of the electrons filled in the 3rd shell as in the 2nd shell. The atomic number of ‘M’ is ______.
