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प्रश्न
What would be the correct order if Zn, Fe, Al and Cu are arranged in increasing order of reactivity?
विकल्प
Cu, Fe, Zn, Al
Al, Cu, Fe, Zn
Zn, Al, Cu, Fe
Fe, Zn, Al, Cu.
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उत्तर
Cu, Fe, Zn, Al
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संबंधित प्रश्न
Fill in the following blank with suitable word:
The basis for modern periodic table is ...............
Fill in the following blank with suitable word:
Group 18 elements are called ...............
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Give two example of group 1 elements.
How were the positions of isotopes of an element decided in the modern periodic table?
The modern periodic table was prepared by ______.
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Ca, Cl, Na, I, Li, Ba, Sr, K, Br
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Explain why all the elements of a period have different chemical properties.
What is the usual number of valence electrons and valency of group 18 elements of the periodic table?
What happens to the number of valence electrons in the atoms of elements as we go down in a group of the periodic table?
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What are the merits of the modern periodic table of elements?
(b) What is the number of elements is 3rd period, the modern periodic table?
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Periodic table
Name two elements in each case:
Actinides
Name the noble gas with 3 shells.
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|
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.
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| Periods | Group 2 | Group 17 |
| 2 | ----- | A |
| 3 | B | ----- |
| 4 | ----- | C |
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| Group No. → | 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| Period ↓ | ||||||||
| 2 | A | B | ||||||
| 3 | E | D | F | C |
Write the molecular formula of the compound formed by the combination:
A and F
A part of modern periodic table is given below. On its basis, answer the following questions:
| Group No. → | 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| Period ↓ | ||||||||
| 2 | A | B | ||||||
| 3 | E | D | F | C |
Write the molecular formula of the compound formed by the combination:
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To which group and period does it belong?
Answer the following in respect of element \[\ce{_16^32S}\].
Give its formula with hydrogen.
Match the atomic number with the following:
An element of group 2.
