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प्रश्न
Answer the following question in one sentence.
The modern periodic table is divided into which blocks?
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उत्तर
The modern periodic table is divided into s-block, p-block, d-block, and f-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?
Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the Periodic Table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?
Fill in the following blank with suitable word:
The basis for modern periodic table is ...............
Explain why, the noble gases are placed in a separate group.
State how the valency of elements varies in a period of the periodic table?
Explain why, the first period of the periodic table has only two elements whereas second period has eight elements
What are the merits of the modern periodic table of elements?
Name two elements in Alkali metals.
Name two elements in halogens.
Name two elements in each case:
Transition element
Name the type of elements which have outermost shell complete.
State its position in the periodic table?
How does the electronic configuration of an atom relate to its position in the modern periodic table?
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)?
State the main aim of classifying elements. Which is the more fundamental property of elements that is used in the development of Modern Periodic Table? Name and state the law based on this fundamental property. On which side of the periodic table one can find metals, non-metals and metalloids?
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.
Name the cation and the anion in the salt – calcium sulphate
Give the symbol and valency of the following element and radical.
Chlorine [Chloride]
Give the symbol and valency of the following element and radical.
Bisulphate
Give the symbol and valency of the following element and radical.
Sulphate
Give the chemical formula of sodium nitrate
State the number of elements in Period 3 of the Periodic Table.
What are the elements.
How were elements arranged in the long form of the periodic table or the Modern Periodic Table?
In the modern periodic table, the positions of 1 to 20 elements are shown here. Identify the elements A and B. Write their atomic number.
Distinguish between:
Group 17 - Group 18
Position of A, B and C three elements is given in the table from the modern periodic table. Answer the following questions.
| Periods | Group 2 | Group 17 |
| 2 | ----- | A |
| 3 | B | ----- |
| 4 | ----- | C |
- What is an element metal or nonmetal?
- Which is the outermost orbit of element B?
- Identify C element and it's physical state.
State whether true or false. If false, correct the statement.
Lanthanides and actinides are kept at the bottom of the periodic table because they resemble each other but they do not resemble with any other group elements.
The arrangement of elements in the Modern Periodic Table is based on their ______.
In the modern periodic table, elements are arranged according to their ______
Which of the following elements would lose an electron easily?
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:
A and F
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.
State the group and period, of the element having three shells with three electrons in valence shell.
What is the general name of the last elements of the Periodic Table?
