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प्रश्न
Find the odd one out and give its explanation.
विकल्प
F
K
Cl
I
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उत्तर
K
Explanation-
K is placed in group 1 while others are placed in group 17 of the modern periodic table.
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संबंधित प्रश्न
In the Modern Periodic Table, which are the metals among the first ten elements?
Fill in the following blank with suitable word:
The basis for modern periodic table is ...............
What is meant by a group, in a periodic table?
How many periods and groups are there in the long form of periodic table?
How were the positions of isotopes of an element decided in the modern periodic table?
How were the positions of cobalt and nickel resolved in the modern periodic table?
On which side of the periodic table will you find non-metals?
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same period of the periodic table?
What are the advantages of the periodic table?
An element X belongs to 3rd period and group 2 of the periodic table. State:
(a) number of valence electrons
(b) valency
(c) metal or non-metal
(d) name of the element
Name the scientist who stated the modern periodic law.
What are horizontal rows and vertical columns in a periodic table known as?
Name the type of elements which have two outermost shell incomplete.
What is the main characteristic of the last element in each period of the periodic table?
State the modern periodic law for classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?
Write a short note.
Position of isotopes in the Mendeleev’s and the modern periodic table.
From the standpoint of atomic structure, what determines which elements will be the first and which the last in a period of the periodic table?
Define the atomic size.
Give the symbol and valency of the following element and radical.
Chlorine [Chloride]
Give the symbol and valency of the following element and radical.
Sulphur [Sulphide]
Give the symbol and valency of the following element and radical.
Bisulphate
Give the symbol and valency of the following element and radical.
Bisulphite
Give the chemical formula of ammonium sulphate
How were elements arranged in the long form of the periodic table or the Modern Periodic Table?
The groups 1 and 2 constitute the _______ block.
The modern periodic table is divided into which blocks?
Distinguish between:
Group 17 - Group 18
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?
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“Hydrogen occupies a unique position in Modern Periodic Table”. Justify the statement.
An element X which is a yellow solid at room temperature shows catenation and allotropy. X forms two oxides which are also formed during the thermal decomposition of ferrous sulphate crystals and are the major air pollutants.
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- Write the electronic configuration of X
- Write the balanced chemical equation for the thermal decomposition of ferrous sulphate crystals?
- What would be the nature (acidic/ basic) of oxides formed?
- Locate the position of the element in the Modern Periodic Table.
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.
Define groups of modern periodic table.
Select the appropriate options and complete the following paragraph:
(metals, non-metals, metalloids, four, seven, s-block, p-block, d-block, f-block).
On the basis of electronic configuration, elements in the modern periodic table are classified Into ______ blocks. Groups 1 and 2 elements are included in ______ and all these elements are metals. (except Hydrogen). Group 13 to 18 elements are included in ______. This block contains metals, non-metals and metalloids. Group 3 to 12 elements are included in ______ and all the elements are ______ elements shown at the bottom of the periodic table i.e. Lanthanides and Actinides constitute ______ and all these elements are metals.
Name the metalloids in the first twenty elements.
Answer the following in respect of element \[\ce{_16^32S}\].
Give its electronic configuration.
Match the atomic number with the following:
A rare gas.
Give reason for the following:
Inert gases do not form ion.
