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प्रश्न
Name and state the following with reference to the elements of the first three periods of the periodic table.
Valency of elements in Group 14 and 15.
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उत्तर
4, 3
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संबंधित प्रश्न
An element 'X' belong to 3rd period and group 13 of the Modern Periodic Table.
(a) Determine the valence electrons and the valency of 'X'.
(b) Molecular formula of the compound formed when 'X' reacts with an element 'Y' (atomic number = 8).
(c) Write the name and formula of the compound formed when 'X' combines with chlorine
Which element has a total of three shells, with four electrons in its valence shell?
An element Z has atomic number 16. Answer the following questions on Z:
1) State the period and group to which Z belongs
2) Is Z a metal or a non-metal?
3) State the formula between Z and hydrogen
4) What kind of a compound is this?
How do electronic configurations of elements change in second period of periodic table with increase in atomic numbers?
Fill in the blank in the following statement:
The tendency to gain an electron ............... on moving down in a group of the periodic table.
What happens to the metallic character of the elements as we move from left to right in a period of the periodic table?
An element A has atomic number 14. To which period does this element belong and how many elements are there in this period.
Arrange the following in order of increasing radii:
N, O, P
What is the common feature of the electronic configuration of the elements at the end of Period 2 and Period 3?
What is meant by a Group in the Periodic Table?
