Four elements P, Q, R and S belong to the third period of the Modern Periodic Table and have respectively 1, 3, 5 and 7 electrons in their outermost shells. Write the electronic configurations of Q and R and determine their valences. Write the molecular formula of the compound formed when P and S combine.
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Q is aluminum
electronic configuration is 2,8,3
valency- 3
R is phosphorus
electronic configuration is 2,8,5
valence electrons 5
p is sodium and s is chlorine
when he combine make sodium chloride
molecular formula is NaCl
electronic configuration is 2,8,3
valency- 3
R is phosphorus
electronic configuration is 2,8,5
valence electrons 5
p is sodium and s is chlorine
when he combine make sodium chloride
molecular formula is NaCl
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