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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
In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?
What is meant by a period, in a periodic table?
How many periods and groups are there in the long form of periodic table?
Which element has the electronic configuration 2, 8, 2?
State the modern periodic law for classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?
Answer the following question.
How it can be proved that the basic structure of the Modern Periodic Table is based on the electronic configuration of atoms of different elements?
Give the symbol and valency of the following element and radical.
Bisulphite
Answer the following question in one sentence.
The modern periodic table is divided into which blocks?
______ group elements are called alkaline earth metals.
State the group and period, of the element having three shells with three electrons in valence shell.
