Class 11ChemistryClassification of Elements and Periodicity in PropertiesExtended or long form of periodic table
DifficultAssuming that elements are formed to complete the $7^{th}$ period,what would be the atomic number of the alkaline earth metal of the $8^{th}$ period?
- A$113$
- B$120$
- C$119$
- D$106$
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