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प्रश्न
How many rows and columns are there in the Modem Periodic Table?
Write the number of periods and groups in the Modern Periodic Table.
उत्तर
In the Modern Periodic Table, there are 18 vertical columns known as Groups and 7 horizontal rows known as Periods.
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संबंधित प्रश्न
How many periods and groups are there in the long form of periodic table?
Consider the following elements:
Ca, Cl, Na, I, Li, Ba, Sr, K, Br
Separate these elements into three groups (families) of similar properties. State one property in each case on the basis of which you have made your choice.
Name two elements in each case: Lanthanides
Answer the following in respect of element `31/15 P`
Give its electronic configuration
State the modern periodic law.
Give the symbol and valency of the following element and radical.
Zinc
Give the chemical formula of ammonium sulphate
State the number of elements in Period 3 of the Periodic Table.
The scientist who propounded the modern periodic law is ______.
Match the atomic number with the following:
A rare gas.
