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प्रश्न
What is a period in a periodic table?
उत्तर
A period is a horizontal row of elements in a periodic table.
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संबंधित प्रश्न
What is the name of those elements which divide metals and non-metals in the periodic table?
Explain why, the noble gases are placed in a separate group.
How does the chemical reactivity of alkali metals vary on going in group 1 of the periodic table?
What is the usual number of valence electrons in the atoms of the last element in a period?
How do the atomic radii of elements change as we go from left to right in a period of the periodic table?
What is the fundamental difference in the electron configurations between the group 1 and group 2 elements?
Write scientific reason.
There was ambiguity about the correct position of hydrogen in Mendeleev’s periodic table.
An X element with atomic number 11 and Y element with atomic number 13 belongs to the third period in the modern periodic table. With this information, give the answers of the below questions.
- Which element has more metallic character from these two elements?
- What is the valency of each X and Y elements?
- Atom size of Y element is smaller than atom size of X element. Explain.
The inert gas which lies in the third period is ______
An element belonging to 3d series of modern periodic table has spin magnetic moment = 5.92 B.M. in +3 oxidation state. The atomic number of elements are ______.
