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प्रश्न
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).
Boron, Aluminium, Gallium, Indium, Thallium
Answer the following question in relation to the above group of elements:
If the electronic configuration of aluminium is 2, 8, 3, how many electrons are there in the outer shell of thallium?
उत्तर
If the electronic configuration of aluminium is 2, 8, 3, then 3 electrons are there in the outer shell of thallium.
संबंधित प्रश्न
How were the positions of isotopes of an element decided in the modern periodic table?
On which side of the periodic table will you find metals?
What is the major characteristic of the first elements in the periods of the periodic table? What is the general name of such elements?
How will the tendency to gain electrons change as we go from left to right across a period? Why?
Give the chemical formula of sodium sulphite
The element which has the least tendency to lose electrons is ______
An element ‘M' has 50% of the electrons filled in the 3rd shell as in the 2nd shell. The atomic number of ‘M’ is ______.
1H2 is an isotope of hydrogen. In the modern Periodic Table it will ______.
Name the metalloids in the first twenty elements.
Name the following metal:
A metal present in period 3, group 1 of the periodic table.
