what is periodic table ???.
Answers
Explanation:
The periodic table, also known as the periodic table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties. ... The seven rows of the table, called periods, generally have metals on the left and non-metals on the right..
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║THE PERIODIC TABLE ║
→more then half elements are discovered in year between 1800 and 1900 . now we are using the modern periodic table .
Q) WHY IT IS CALLED periodic table ?
→by increasing the no of protons , the new nucleus are having same chemical and physical property's same as previous nucleus.
Q) BRIEF ABOUT MODERN PERIODIC TABLE ??
→ it is distributed in the different groups and period .
TOTAL GROUPS >>
18
TOTAL PERIOD >>
7
- it contain metal, non metal metalloids .
- it have total 118 element
IT HAVE 4 BLOCKS
- s block
- p block
- d block
- f block
exceptions >>
HYDROGEN IS NOT SET IN ANY BLOCK TILL NOW .
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