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प्रश्न
What are the periods in a periodic table?
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उत्तर
“Horizontal rows from left to right in a periodic table are called periods.”
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संबंधित प्रश्न
How many rows and columns are there in the modern periodic table?
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same group of the periodic table?
What are horizontal rows and vertical columns in a periodic table known as?
Correct the statement.
Transition elements are placed at extreme right of the periodic table.
Name the type of elements which have outermost shell complete.
Name the type of elements which have two electrons in the outermost orbit.
Name the noble gas with 3 shells.
Write scientific reason.
There was ambiguity about the correct position of hydrogen in Mendeleev’s periodic table.
Arrange the following elements in the increasing order of their metallic character
| Mg, | Ca, | K, | Ge, | Ga |
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has variable valency and is a member of the Oxygen family (group 16).
