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प्रश्न
State the group and period, of the element having three shells with three electrons in valence shell.
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उत्तर
If there are three shells, the element belongs to the third period. An element with three valence electrons belongs to the 13 group.
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संबंधित प्रश्न
Write the names given to the vertical columns and horizontal rows in the Modern Periodic Table. How does the metallic character of elements vary on moving down a vertical column? How does the size of atomic radius vary on moving left to right in a horizontal row? Give reason in support of your answer in the above two cases.
What is the significance of atomic number in the modern classification of elements? Explain with the help of an example.
What is the name of those elements which divide metals and non-metals in the periodic table?
The three elements having chemical symbols of Si, B and Ge are:
(a) all metals
(b) all non-metals
(c) all metalloids
(d) Si is metalloid, B is metal and Ge is non-metal
State how the valency of elements varies in a group of the periodic table?
Define:
Periodic table
Name two elements in Inert gas.
Define the atomic size.
The scientist who propounded the modern periodic law is ______.
- Write the electronic configuration of element X, given by its symbol as under: \[\ce{^40_20 X}\]
- Determine its position in the modem periodic table.
- What is the nature of its oxide?
- Name one other element of its group.
