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The electronic configuration of Mg is...

The electronic configuration of Mg is _____

A

2,8,1

B

2,8,7

C

2,8,2

D

2,8

Text Solution

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The correct Answer is:
C
The atomic number of Mg is 12 i.e, its electronic configuration is 2,8, 2.
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ICSE-SAMPLE PAPER 3 -MULTIPLE CHOICE QUESTION
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  2. An element having electronic configuration 2, 8, 18, 3 belongs to whic...

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  3. The electronic configuration of Mg is

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  4. An element having atomic number 17 and belongs to halogens is

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  5. How many valence electrons are present in Mg?

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  6. Write the name of a non-metal of group 15.

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  7. When fused lead bromide is electrolysed we observe:

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  8. Arrange the following as per the instructions given in the brackets: ...

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  9. A chloride which forms a precipitate that is soluble in excess of ammo...

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  10. Sodium carbonate is a basic salt because it is a salt of a:

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  11. A polar covalent bond will be formed in which one of these pair of ato...

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  12. Sodium carbonate is a basic salt because it is a salt of a:

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  13. The vessel in which electrolysis of lead bromide is carried out is:

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  14. Arrange the following as per instructions given in the brackets: Cl,...

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  15. A solution of the compound which gives a dirty green precipitate with ...

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  16. Alkalis are :

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  17. Aluminium has a tendency to loose ......... electrons.

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  18. An organic compound contains carbon , hydrogen and oxygen . Its elemen...

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  19. Which soln. becomes a deep/inky blue colour when excess of ammonium hy...

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