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प्रश्न
The groups 1 and 2 constitute the _______ block.
पर्याय
s
p
d
q
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उत्तर
The groups 1 and 2 constitute the s block.
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संबंधित प्रश्न
Fill in the blank:
The modern periodic table consists of ……………. periods.
Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?
How does the electronic configuration of an atom relate to its position in the Modern Periodic Table?
What is periodicity in properties of elements with reference to the Modern Periodic Table?
How does the tendency of elements to gain electrons change as we move from left to right in a period? State the reason of this change.
Fill in the following blank with suitable word:
The horizontal rows in a periodic table are called ...............
Give two example of group 17 elements.
How were the positions of cobalt and nickel resolved in the modern periodic table?
The modern periodic table was prepared by ______.
Explain why All the elements of a group have similar chemical properties.
What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements?
Which of the following are the correct characteristics of isotopes of an element?
(i) same atomic mass
(ii) same atomic number
(iii) same physical properties
(iv) same chemical properties
(a) (i), (ii) and (iv)
(b) (ii), (iii) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)
The elements A, B, C and D belong to groups 1, 2, 14 and 17 respectively of the periodic table. Which of the following pairs of elements would produce a covalent bond?
(i) A and D
(ii) C and D
(iii) A and B
(iv) B and C
(v) A and C
Name two elements in Inert gas.
Name two elements in each case: Lanthanides
Name two elements in each case:
Actinides
Name the type of elements which have two outermost shell incomplete.
An element E has following electronic configuration:
|
K |
L |
M |
|
2 |
8 |
6 |
(a) To which group of the periodic table does element E belong?
(b) To which period of the periodic table does element E belong?
(c) State the number of valence electrons present in element E.
(d) State the valency of the element E.
How will the tendency to gain electrons change as we go from left to right across a period? Why?
What would be the correct order if Zn, Fe, Al and Cu are arranged in increasing order of reactivity?
What is the number of elements in the 1st period?
Give the symbol and valency of the following element and radical.
Hydrogen
Give the symbol and valency of the following element and radical.
Ammonium
Give the symbol and valency of the following element and radical.
Nitrate
Give the chemical formula of sodium sulphite
State the number of elements in Period 3 of the Periodic Table.
What are the elements.
Find the odd one out and give its explanation.
Complete the following flow chart.
An X element with atomic number 11 and Y element with atomic number 13 belongs to the third period in the modern periodic table. With this information, give the answers of the below questions.
- Which element has more metallic character from these two elements?
- What is the valency of each X and Y elements?
- Atom size of Y element is smaller than atom size of X element. Explain.
______ forms the basis of the modern periodic table.
The amount of energy released when one or more electrons is added to the neutral atom is ______
What is the symbol of the element Tungsten?
______ group elements are called alkaline earth metals.
Spot the error:
There are 5 periods and 17 groups in the 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 two elements that you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
Name the following metal:
A metal present in period 3, group 1 of the periodic table.
