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Nature of Oxides

Four elements...

Question

Four elements A,B,C and D have atomic numbers 12,13,14 and 15 respectively.
Which of these elements will form the most basic oxide?

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Solution

A (because they are in same period and metallic character decreases in a period due to increase in the nuclear charge).

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Q. Four elements A,B,C and D have atomic numbers 12,13,14 and 15 respectively.
Which of them will have largest atomic radii?

Q. Four elements

A, B, C

D

have atomic numbers 12,13,14 and 15 respectively.
What is/are valency(ies) of

D

Q. Elements A, B and C belong to the same period in the long form of the periodic table. The nature of the oxides of A, B and C is amphoteric, basic and acidic respectively. The correct order of the atomic numbers of these elements is :

X, Y,

Z

have atomic numbers

6, 9

11

respectively. Which one will form a cation?

Three elements 'X', 'Y' , 'Z' having atomic number 11, 7 , 6 respectively react with oxygen to form their iroxides .

Arrange these oxides in increasing order of their basic nature.

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