An element P (atomic number 20) reacts with an element Q (atomic number 17) to form a compound. Answer the following questions giving reason :
An element P (atomic number 20) reacts with an element Q (atomic number 17) to form a compound. Answer the following questions giving reason :
Write the position of P and Q in the Modern Periodic Table.
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| Position of P Group-2 | Because it has 2 valence electrons/ 2, S, 8, 2 |
| Period-4 | Because it has 4 shells/2,8,8,2 |
| Position of Q Croup-17 | Because it has 7 valence electrons/ 2, 8, 7 |
| Period-3 | Because it has 3 shells/ 2, 8,7 |
| Formula PQ2 | Because valency of P is 2 and that of Q is 1 |
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