explain Modern Periodic Table according to spdf block
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Elements in the long form of periodic table have been divided into four blocks i.e. s ,p ,d and f. This division is based upon the name of the orbitals which receives the last electron. 1)Elements in which the last electron enters the s orbital of their respective outermost shells are called s block elements.
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modern periodic table contain 118 elements out of which 94 are naturally occurring and the rest 24 are artificial.
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