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प्रश्न
The d-block elements are called as _______ elements.
पर्याय
transition
metalloid
normal
inner transition
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उत्तर
The d-block elements are called as transition elements.
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संबंधित प्रश्न
Fill in the blank:
The modern periodic table consists of ……………. periods.
In the Modern Periodic Table, which are the metals among the first ten elements?
Which of the following statement is correct in regard to the classification of elements?
(a) Elements in modern periodic table are arranged on the basis of increasing atomic masses.
(b) Elements in Mendeleev's periodic table are arranged on the basis of increasing atomic numbers.
(c) In modern periodic table, the element nickel of lower atomic mass is kept before the element cobalt of higher atomic mass.
(d) In modern periodic table, the isotopes of chlorine having different atomic masses are kept in the same group.
Which element has two shells, both of which are completely filled with electrons?
Which element has the electronic configuration 2, 8, 2?
State whether the following statement is true or false:
On going down in a group of the periodic table, the number of valence electrons increases.
What is the usual number of valence electrons and valency of group 18 elements of the periodic table?
What is the number of elements is 1st period the modern periodic table?
The atomic numbers of the three elements X, Y and Z are 2, 6 and 10 respectively.
(i) Which two elements belong to the same group?
(ii) Which two elements belong to the same period?
Give reasons for your choice.
What are horizontal rows and vertical columns in a periodic table known as?
Answer the following in respect of element `31/15 P`
Give its electronic configuration
The electronic configuration of an element T is 2, 8, 8, 1.
What is the period number of T?
Name an alkali metal in period 3 and halogen in period 2.
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?
How will the tendency to gain electrons change as we go from left to right across a period? Why?
An element A has 2 electrons in its fourth shell. State its electronic configuration.
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
In the Modern Periodic Table – atoms of all elements are arranged according to their increasing order of – atomic numbers. An atom of nitrogen has seven protons and seven electrons. State what would be its atomic number.
Give the symbol and valency of the following element and radical.
Aluminium
Give the symbol and valency of the following element and radical.
Oxygen [Oxide]
Give the symbol and valency of the following element and radical.
Carbonate
Give the symbol and valency of the following element and radical.
Sulphite
Give the chemical formula of calcium phosphate
State the number of elements in Period 1 of the Periodic Table.
Group 1 and 2 : s block : : group 13 and 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 A element metal or nonmetal?
- Which is the outermost orbit of element B?
- Identify C element and it's physical state.
Noble gases belong to______ group of the periodic table.
State any five features of modern periodic table.
______ is the longest period in the periodical table.
The scientist who propounded the modern periodic law is ______.
Which of the following is the outermost shell for elements of period 2?
Which of the following elements would lose an electron easily?
Which of the following elements does not lose an electron easily?
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
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 |
Which of the element is a Noble gas?
Define groups of 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.
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?
