Question

The number of penultimate electrons in magnesium atom are​

Answer 1

Answer:

12 electrons

Explanation:

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Answer 2

Answer:

.. for the element of MAGNESIUM, you already know that the atomic number tells you the number of electrons. That means there are 12 electrons in a magnesium atom. Looking at the picture, you can see there are two electrons in shell one, eight in shell two, and two more in shell three

Explanation:

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