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प्रश्न
What are the elements.
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उत्तर
“Elements are pure substances made up of one kind of atoms and cannot be broken down into simpler substances.” 118 elements are there.
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संबंधित प्रश्न
Give two example of group 18 elements.
On which side of the periodic table will you find non-metals?
Name the scientist who prepared modern periodic table.
How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
Name two elements in Alkali metals.
How were elements arranged in the long form of the periodic table or the Modern Periodic Table?
State whether true or false. If false, correct the statement.
Lanthanides and actinides are kept at the bottom of the periodic table because they resemble each other but they do not resemble with any other group elements.
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 same valency as Lithium.
Spot the error:
There are 5 periods and 17 groups in the modern periodic table.
An element has the atomic number 12.
- Write the electric configuration.
- To which group and period does it belong.
