Question

1#

An electrically neutral atom has electron configuration 1s^2s^2 2p^6 3s^2 what is the name of this atom.

sodium

aluminum

magnesium

oxygen


2#
what is the electron configuration for an electrically neutral atom of neon (Ne)?

1s^2 2s^2 2p^4

1s^2 2s^2 2p^4d^2

1s^2 2s^2 2p^6

1s^2 2s^2 ​

Answer 1

1= Magnesium

2 = Option 3 = 1s² 2s² 2p⁶

Step-by-step explanation:

An electrically neutral atom consist of equal number of protons and electrons.

The answer for 1st q is magnesium because the electronic configuration showed twelve number of electrons. The atomic number of magnesium is twelve that's why this configuration is of Mg.

Mg₁₂ = 1s² 2s² 2p⁶ 3s²

The second answer is option three because has atomic number ten and third electronic configuration have ten electrons.

Ne₁₀ = 1s² 2s² 2p⁶

It is stable electronic configuration. Neon is inert because of this electronic configuration. The outer most shell is completely filled.