Question

1. An element Y has its first 2 shells completely filled and the 3rd shell has same number of electrons as in the first shell.
a) Identify the element Y and state its atomic number.
b) Draw the Bohr atomic model of Y.

Answer 1

Answer:

element Y has its first 2 shell completely filled,

therefore, 1st shell have 2 electrons and the 2and shell has 8 electrons..

it is given that 3rd shell has the same number of electrons and in the first. it means 3rd shell has 2 electrons in it.

the Y element is Magnesium (Mg) with atomic number 12...

the bohr atomic model of Y is given above...

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