Question

If you were writing an electron configuration for silicon using the noble gas notation, which noble gas would you use?


Ne


He


Ar


Xe

Answer 1

Hey friend!

Here is your answer;

The atomic number of silicon is 16

The nearest low noble gas to silicon is neon (10)

Hence,

Silicon is [Ne]3s^2 3p^2


I hope it helps you

Answer 2

Answer:

Sodium, element number eleven, is the first element in the third period of the periodic table. Its electron configuration is 1s22s22p63s1 . The first ten electrons of the sodium atom are the inner-shell electrons and the configuration of just those ten electrons is exactly the same as the configuration of the element neon (Z=10) . This provides the basis for a shorthand notation for electron configurations called the noble gas configuration. The elements that are found in the last column of the periodic table are an important group of elements that are called the noble gases. They are helium, neon, argon, krypton, xenon, and radon. A noble gas configuration of an atom consists of the elemental symbol of the last noble gas prior to that atom, followed by the configuration of the remaining electrons. So for sodium, we make the substitution of [Ne] for the 1s22s22p6 part of the configuration. Sodium's noble gas configuration becomes [Ne]3s1 . Table 5.19.1 shows the noble gas configurations of the third period elements.

Table 5.19.1 : Electron Configurations of Third-Period Elements

Sodium

Na

11

[Ne]3s1

Magnesium

Mg

12

[Ne]3s2

Aluminum

Al

13

[Ne]3s23p1

Silicon

Si

14

[Ne]3s23p2

Phosphorus

P

15

[Ne]3s23p3

Sulfur

S

16

[Ne]3s23p4

Chlorine

Cl

17

[Ne]3s23p5

Argon

Ar

18

[Ne]3s23p6

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