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The correct formula of the oxide of Eka-...

The correct formula of the oxide of Eka-aluminium element predicted by Mendeleev was:

A

`EaO_(3)`

B

`Ea_(3)O_(2)`

C

`Ea_(2)O_(3)`

D

`EaO`

Text Solution

Verified by Experts

The correct Answer is:
C
NA
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LAKHMIR SINGH & MANJIT KAUR-PERIODIC CLASSIFICATION OF ELEMENTS-Exercise
  1. The atomic numbers of the elements Na, Mg, K and Ca are 11,12,19 and 2...

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  2. Which of the following are the correct characteristics of isotopes of ...

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  3. The correct formula of the oxide of Eka-aluminium element predicted by...

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  4. The element which can form an acidic oxide should be the one whose ato...

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  5. The element which forms a basic oxide has the atomic number of:

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  6. Which one of the following does not increase while moving down the gro...

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  7. On moving from left to right in a period in the periodic table, the si...

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  8. Which of the following set of elements is written in order of their in...

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  9. The atomic numbers of the three elements X,Y and Z are 2,6 and 10 resp...

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  10. An atom has the electronic structure of 2,7 (a) What is the atomic n...

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  11. Consider the following elements, ""(20)Ca, ""(8)O, ""(18)Ar, ""(16)S...

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  12. In the each of the following pairs, choose the atom having the bigger ...

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  13. The atomic numbers of three elements A,B and C are given below: Elem...

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  14. An element X belongs to 3rd period and group 2 of the periodic table. ...

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  15. The following diagram shows a part of the periodic table in which the ...

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  16. An element X is in group of the periodic table: (a) What will be the...

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  17. An element Y is in second period and group 16 of the periodic table: ...

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  18. (a) An element X has mass number 40 and contains 21 neutrons in its at...

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  19. An element X combines with oxygen to form an oxide XO. This oxide is e...

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  20. An element A has an atomic number of 6. Another element B has 17 elect...

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