Question

What is the neutral atom that has its first two energy levels filled, has 2 electrons in its third energy level, and has no other electrons?

Answer 1

Answer:

The element would be Magnesium.

Explanation:

Magnesium has 12 electrons in total.

The first shell (energy level) can hold 2 electrons.

Then, every shell after this can hold a maximum of 8 electrons. So, a full second shell would take us up to 10 electrons. The spare 2 are in the third energy level as stated in the question.

(2+8+2 = 12)

The electronic configuration for this can be written as 2.8.2 or 1s^2 2s^2 2p^6 3s^2

Answer 2

The neutral atom that has its first two energy levels filled, has 2 electrons in its third energy level, and has no other electrons is magnesium.

Electrons in atoms are arranged in energy levels. These energy levels correspond to shells in the Bohr model of the atom.

The atom thus described in the question has its first and second energy levels filled and two electrons in the third level.

This corresponds to the electronic configuration; [Ne] 3s2. This electronic configuration belongs to magnesium.

Learn more: https://brainly.com/question/14283892