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प्रश्न
What do you understand by typical elements?
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उत्तर
The third period elements, Na, Mg, Al, Si, P and Cl summarize the properties of their respective groups and are called typical elements.
संबंधित प्रश्न
Fill in the following blank with suitable word:
Group 18 elements are called ...............
Is it possible to have an element having atomic number 1.5 placed between hydrogen and helium?
How does the chemical reactivity of the halogens vary on going in group 17 of the periodic table?
State the term
The tabular arrangement of elements in horizontal rows and vertical columns _________
State what is meant by the term chemical formula.
The arrangement of elements in the Modem Periodic Table is based on their ______
An element which is an essential constituent of all organic compounds belongs to
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).
Explain giving reason why although the nuclear charge in atoms increases in moving from left to right in a period as well as in moving from top to bottom in a group in the Modern periodic table, but the size of the atoms does not vary similarly in both situations.
Give the criteria on the basis of which elements are placed (i) in a group and (ii) in a period in the modern periodic table. The atomic number of an element is 16. According to the criteria, in which group and period it should be placed?
