Advertisements
Advertisements
प्रश्न
The scientist who propounded the modern periodic law is ______.
Advertisements
उत्तर
The scientist who propounded the modern periodic law is Dimitri Mendeleev.
APPEARS IN
संबंधित प्रश्न
How were the positions of isotopes of an element decided in the modern periodic table?
The atomic numbers of four elements P, Q, R and S are 6, 8, 14 and 16 respectively. Out of these, the element known as metalloid is:
(a) P
(b) Q
(c) R
(d) S
How does the chemical reactivity of the halogens vary on going in group 17 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?
What are the merits of the modern periodic table of elements?
Correct the statement.
Copper and zinc are representative elements.
How does number of (i) valence electrons (ii) valency; vary on moving from left to right in the second period of a periodic table?
Give the symbol and valency of the following element and radical.
Carbonate
Give the chemical formula of magnesium nitrate
Give reason for the following:
Inert gases do not form ion.
