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2 September, 08:23

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

+2
Answers (1)
  1. 2 September, 11:48
    0
    1 = Magnesium

    2 = Option 3 = 1s² 2s² 2p⁶

    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.
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