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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
Give two example of group 17 elements.
Give two example of group 18 elements.
Is it possible to have an element having atomic number 1.5 placed between hydrogen and helium?
Which of the following statement about the modern periodic table is correct?
(a) It has 18 horizontal rows known as periods.
(b) It has 7 vertical columns known as periods.
(c) It has 18 vertical columns known as groups.
(d) It has 7 horizontal rows known as groups.
How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
How would the tendency to lose electrons change as we go from left to right across a period of the periodic table?
How do the atomic radii of elements change as we go from left to right in a period of the periodic table?
Explain why all the elements of a period have different chemical properties.
What happens to the number of valence electrons in the atoms of elements as we go down in a group of the periodic table?
What is a group in the periodic table?
Helium and neon are unreactive gases. What, if anything, do their atoms have in common?
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.
Name the scientist who stated the modern periodic law.
Name the type of elements which have outermost shell complete.
Arrange the elements of second and third periods in increasing order of their atomic size.
Third Period.
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)?
The electronic configuration of an element T is 2, 8, 8, 1.
What is the group number of T?
Name the noble gas with 3 shells.
How will the tendency to gain electrons change as we go from left to right across a period? Why?
Name an element of group 18 which can form compounds.
An element A has 2 electrons in its fourth shell. State its electronic configuration.
Give the symbol and valency of the following element and radical.
Aluminium
Give the symbol and valency of the following element and radical.
Ammonium
Give the symbol and valency of the following element and radical.
Carbonate
State what is meant by the term chemical formula.
Give the chemical formula of ammonium sulphate
Give the chemical formula of calcium phosphate
State the number of elements in Period 3 of the Periodic Table.
Right or wrong sentence.
The K and L shells of the elements Na and Mg contain electrons.
Write a scientific reason.
Lithium and sodium are included in the same group in the periodic table.
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.
Elements in the modern periodic table are arranged in ______groups and______ periods.
State any five features of modern periodic table.
______ and ______ are called inner transition elements.
The element which has the least tendency to lose electrons is ______
Which of the following statements about the Modern Periodic Table is correct:
Which of the following elements will form an acidic oxide?
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).
Boron, Aluminium, Gallium, Indium, Thallium
Answer the following question in relation to the above group of elements:
If the electronic configuration of aluminium is 2, 8, 3, how many electrons are there in the outer shell of thallium?
