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प्रश्न
An element X is in group 2 of the periodic table what will be the formula of its oxide?
उत्तर
We know that oxygen has 6 valence electrons and needs 2 more electrons to complete its octet. Therefore, the valency of oxygen O is 2, that is, (8 - 6). Both X and O have the same valency. When one atom of X combines with one atom of O, an ionic compound of the formula XO is formed.
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संबंधित प्रश्न
Rewrite the following statement after correction, if necessary:
Groups have elements with consecutive atomic numbers.
Rewrite the following statement after correction, if necessary:
Periods are the horizontal rows of elements.
(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.
Answer the following question.
Write the name, symbol, and electronic configuration of an element X whose atomic number is 11.
Elements belonging to the same group have the same valency.
Among the given species A–, A+, and A, the smallest one in size is ______.
Which of the following hydroxides is most basic?
In which group are inert elements placed?
Which of the following metals have low melting and boiling point?
The atomic number of an element 'X' is 11.
- Write the electronic configuration of X and find its valency.
- Write the formula and nature of its oxide.
