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प्रश्न
A metal X is in the first group of the periodic table. What will be the formula of its oxide?
उत्तर
The elements in the first group of the periodic table have a valency of 1. As the metal X is in the first group, its valency is 1. We know that the valency of oxygen is 2 because it needs two electrons to complete its outer shell of 8. From this, we can conclude that two atoms of metal X will combine with one atom of oxygen to form an oxide X2O. Therefore, the formula of the oxide of metal X is X2O.
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संबंधित प्रश्न
The following diagram shows a part of the periodic table containing first three periods in which five elements have been represented by the letters a, b, c, d and e (which are not their chemical symbols):
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1 18 a 2 13 14 15 16 17 b c d e
(i) Select the letter which represents an alkali metal.
(ii) Select the letter which represents a nobles gas.
(iii) Select the letter which represents a halogen.
(iv) What type of bond is formed between a and e?
(v) What type of bond is formed between d and e?
(a) How is possible valency of an element determined from the electronic configuration of its atom ?
(b) Determine the valency of an element X whose atomic number is 15.
What is the need for classification of elements?
Classify the following elements into Metals and Nonmetals.
S, Mg, Al, P, N, Na.
The number of periods and groups in the periodic table are ______
______ group contains the member of the halogen family.
Identify the bond between H and F in the HF molecules.
An element X combines with oxygen to form an oxide XO. This oxide is electrically conducting. Write the formula of the compound formed when X reacts with chlorine.
Arrange the following elements in the order of their decreasing metallic character
Na, Si, Cl, Mg, Al
Relate the names of the following scientists with the statements given below.
Arranged elements in the increasing order of atomic mass.
