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प्रश्न
The scientist who propounded the modern periodic law is ______.
उत्तर
The scientist who propounded the modern periodic law is Dimitri Mendeleev.
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संबंधित प्रश्न
How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
What is the major characteristic of the first elements in the periods of the periodic table? What is the general name of such elements?
(b) What is the number of elements is 3rd period, the modern periodic table?
Two elements P and Q belong to the same period of the modern periodic table and are in group 1 and group 2, respectively. Compare the following characteristics in the tabular form.
- Number of electrons in their atoms
- Their tendency to lose electrons
- Their metallic characters
- Formation of their oxides
- Formulae of their chlorides
Give the symbol and valency of the following element and radical.
Hydroxide
Give the chemical formula of sodium sulphite
The groups 1 and 2 constitute the _______ block.
Explain structure of modern periodic table in short.
Where would you locate the element with electronic configuration 2,8 in the Modern Periodic Table?
If an element X is placed in group 14, what will be the formula and the nature of bonding of its chloride?
