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प्रश्न
How many rows and columns are there in the modern periodic table?
Write the number of periods and groups in the modern periodic table.
Answer the following sub-question regarding the modern periodic table:
Write the number of periods and groups.
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उत्तर
In the modern periodic table, there are 18 vertical columns known as groups and 7 horizontal rows known as periods.
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संबंधित प्रश्न
In the Modern Periodic Table, which are the metals among the first ten elements?
What is periodicity in properties of elements with reference to the Modern Periodic Table?
Fill in the following blank with suitable word:
The horizontal rows in a periodic table are called ...............
Give two example of group 18 elements.
How were the positions of cobalt and nickel resolved in the modern periodic table?
Would you place the two isotopes of chlorine, CI-35 and CI-37 in different slots because of their different atomic masses or in the same slot because their chemical properties are the same? Justify your answer.
Is it possible to have an element having atomic number 1.5 placed between hydrogen and helium?
The modern periodic table was prepared by ______.
How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
Explain why All the elements of a group have similar chemical properties.
What is a period in a periodic table?
What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements?
In the modern Periodic Table, why does cobalt with higher atomic mass of 58.93 appear before nickel having lower atomic mass of 58.71?
What are the advantages of the periodic table?
Correct the statement.
Copper and zinc are representative elements.
What do you understand by typical elements?
Name the metals in the first twenty elements.
Name the type of elements which have outermost shell complete.
Name the type of elements which have one electron short of octet.
Name the type of elements which have two electrons in the outermost orbit.
Answer the following in respect of element `31/15 P`
Give its electronic configuration
What is the main characteristic of the last element in each period of the periodic table?
An element barium has the atomic number 56. Look up its position in the periodic table and answer the following question.
Is it larger or smaller than caesium (Cs)?
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.
Nitrogen [Nitride]
Give the symbol and valency of the following element and radical.
Bicarbonate
Give the symbol and valency of the following element and radical.
Sulphate
State what the group number in the Modern Periodic Table signifies. Give a reason why elements in the same group, have similar valency and similar chemical properties.
State the number of elements in Period 2 of the Periodic Table.
State the number of elements in Period 3 of the Periodic Table.
Find the odd one out and give its explanation.
The K and L shells of the elements Na and Mg contain electrons.
Write an Explanation.
Period
Elements in the modern periodic table are arranged in ______groups and______ periods.
The scientist who propounded the modern periodic law is ______.
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
- 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.
An element with atomic number ______ will form a basic oxide.
What is the general name of the last elements of the Periodic Table?
Match the atomic number with the following:
A rare gas.
