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Structure of Atom
Question
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Write the electronic configuration of elements from atomic number 11 to atomic number 20. Also name the elements.

Answer

Electronic configuration of the element from atomic number 11 to 20.

Element

Atomic number (Z)

Electronic configuration

Sodium (Na)

11

[Ne]10 3s1

Magnesium (Mg)

12

[Ne]10 3s2

Aluminium (Al)

13

[Ne]10 3s2 3p1

Silicon (Si)

14

[Ne]10 3s2 3p2

Phosphorus (P)

15

[Ne]10 3s2 3p3

Sulphur (S)

16

[Ne]10 3s2 3p4

Chlorine (Cl)

17

[Ne]10 3s2 3p5

Argon (Ar)

18

[Ne]10 3s2 3p6

Potassium (K)

19

[Ar]10 4s1

Calcium (Ca)

20

[Ar]10 4s2

Sponsor Area

Some More Questions From Structure of Atom Chapter

Who discovered neutron?

What is a neutron?

What is the name of the remaining part of atom except outer orbit?

Name the particles which determine the mass of an element.

What are α-particles?

Why were neutrons discovered very late?

What are the fundamental particles present in a neutral atom having atomic number greater than 1?

Do protons and neutrons have identical mass?

When α-particles are sent through a thin metal foil, most of them go straight through the foil. What inference do you draw from it?