Sodium and Aluminium have same atomic number 11 and 13 respectively. They are separated by one element in the periodic table and have valencies 1 and 3 respectively. Chlorine and potassium are also separated by 1 element in the periodic table and yet they both have valency 1 .
Explain why ?
Plz it's really important!
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They are separated by a noble gas
chlorine has 7 electrons in its outer shell and potassium has 1 and therefore chlorine gains 1 and potassium loses 1 electron.
The number of electrons that take part in both the case is 1.
That's why they have valency 1
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