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प्रश्न
Give a reason why elements need to be properly classified.
उत्तर
Reason of classification of elements:
- It makes the study of elements in an organized manner.
- To help and correlate the properties of elements with the fundamental properties of different states of matter.
- To help to define the relationship of one element with others.
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संबंधित प्रश्न
An element P (atomic number 20) reacts with an element Q (atomic number 17) to form a compound. Answer the following questions giving reason:
Write the position of P and Q in the Modern Periodic Table and the molecular formula of the compound formed when P reacts with Q.
Rewrite the following statement after correction, if necessary:
Periods are the horizontal rows of elements.
Why do we classify elements?
The element X forms a compound X2Y. Suggest an element that Y might be and give reasons for your choice.
Find the neutral atom in the periodic table which has the same number of electrons as K+ and Cl−. What is this number?
Answer the following question.
Write the name, symbol, and electronic configuration of an element X whose atomic number is 11.
Example for liquid metal is ______.
The number of periods and groups in the periodic table are ______
Moseley’s periodic table is based on atomic mass.
Name the neutral atom in the Periodic Table which has the same number of electrons as K+ and Cl-.
