an element x has mass number 23 and protons number 12 a) mention its group number and period number
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Answer:
2nd Group and 3rd period
Explanation:
No. of electron = No. of Protons in netural elements
The periodic table is based on atomic number ( Which is nothing but no. of electron )
Magnesium (Mg) has atomic number of 12 ... that means 12 electron ..... 12 Protons
Mg lies in 2nd group S block and 3rd period
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