Question

an atom of an element has 7 electrons in the outermost L shell what will be atomic number? what will valency? draw a schematic diagram using bhor model​

Answer 1

It has 7 electrons in Lshell qhich os ots outer most shell. K has 2 electrons ( because K shell can hold max. 2 electrons)and L has 7 electrons so total no. Of electrons are 9 atomic no. Is 9 element is fluorine valency is 1 since L shell can hold max.8 electrons and the element has 7 electrons so valency is 1

Bohr 's atomic model

K shell 2 and L shell 7

Answer 2

The atomic no. Is 9.Its valency is -1 as it gain one electron toachieve inert gas configuration.