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प्रश्न
Find the correlation:
Group 13 to 18 : p block : : ______ : d block
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उत्तर
Group 13 to 18 : p block : : Group 3 to 12 : d block
Explanation:
The d-block in the Modern Periodic Table consists of Groups 3 to 12. These elements are referred to as "transition elements" because they act as a bridge between the highly electropositive s-block metals and the electronegative p-block non-metals. In these elements, the last electron enters the d-orbital of the penultimate shell.
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संबंधित प्रश्न
Name the scientist who first of all showed that atomic number of an element is a more fundamental property than its atomic mass.
State modern periodic law.
Fill in the following blank with suitable word:
The basis for modern periodic table is ...............
Give two example of group 18 elements.
where should hydrogen be placed in the modern periodic table? Give reason for your answer.
Explain why, the first period of the periodic table has only two elements whereas second period has eight elements
In what respects do the properties of group 1 elements differ from those of group 17 elements? Explain with examples by taking one element from each group.
From the standpoint of atomic structure, what determines which element will be the first and which the last in a period the periodic table?
What are the advantages of the periodic table?
What are the groups in a periodic table? Give two characteristics of each.
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
How many groups and periods does the modern periodic table have?
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?
Answer the following in respect of element `31/15 P `
To which group and period does it belong?
Write a short note.
Structure of the modern periodic table.
What is meant in the periodic table by a period?
Two elements P and Q belong to the same period of the modern periodic table and are in group 1 and group 2, respectively. Compare the following characteristics in the tabular form.
- Number of electrons in their atoms
- Their tendency to lose electrons
- Their metallic characters
- Formation of their oxides
- Formulae of their chlorides
Give the symbol and valency of the following element and radical.
Zinc
State what is meant by the term chemical formula.
Give the chemical formula of sodium hydroxide
Give the chemical formula of magnesium nitrate
Fill in the blank:
The element lithium in the Modern Periodic Table with valency 1+ belongs to the group ______.
Name the following:
The group of the Modern Periodic Table to which calcium [Ca2+] belongs.
Compare Modern Periodic Law with Mendeleev's Periodic Law.
Which of the following statements about the Modern periodic table is correct?
Find the odd one out and give its explanation.
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?
______ is the longest period in the periodical table.
The arrangement of elements in the Modern Periodic Table is based on their ______.
Which of the following statements about the Modern Periodic Table is correct:
Which of the following elements does not lose an electron easily?
Three elements A, B and C have 3, 4 and 2 electrons respectively in their outermost shell. Give the group number to which they belong in the Modern Periodic Table. Also, give their valencies.
If an element X is placed in group 14, what will be the formula and the nature of bonding of its chloride?
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has variable valency and is a member of the Oxygen family (group 16).
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:
E and B
Define periods of modern periodic table.
Define groups of modern periodic table.
