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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.
Explanation:
The d-block elements are known as transition elements because they are positioned between the highly reactive s-block metals and the less metallic p-block elements. Their properties represent a “transition” from the strongly electropositive nature of s-block metals to the covalent and non-metallic nature of p-block elements.
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संबंधित प्रश्न
Fill in the following blank with suitable word:
The horizontal rows in a periodic table are called ...............
What is meant by a period, in a periodic table?
Give two example of group 18 elements.
The atomic numbers of four elements P, Q, R and S are 6, 8, 14 and 16 respectively. Out of these, the element known as metalloid is:
(a) P
(b) Q
(c) R
(d) S
The atomic particle whose number in the atoms of an element always remains the same and which forms the real basis for the modern classification of elements is:
(a) electron
(b) proton
(c) neutron
(d) meson
What is the usual number of valence electrons in the atoms of the last element in a period?
On the basis of electronic configuration, how will you identify the first element of a period?
What are the periods in a periodic table? Give two characteristics of each.
Which of the following are the correct characteristics of isotopes of an element?
(i) same atomic mass
(ii) same atomic number
(iii) same physical properties
(iv) same chemical properties
(a) (i), (ii) and (iv)
(b) (ii), (iii) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)
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
Name two elements in each case:
Actinides
Name an alkali metal in period 3 and halogen in period 2.
Write a short note.
Position of isotopes in the Mendeleev’s and the modern periodic table.
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A covalent compound formed by an element in period 2 and a halogen.
Give the symbol and valency of the following element and radical.
Hydrogen
Give the symbol and valency of the following element and radical.
Nitrate
Give the symbol and valency of the following element and radical.
Carbonate
Give the chemical formula of sodium hydroxide
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Name the following:
The group of the Modern Periodic Table to which calcium [Ca2+] belongs.
State the number of elements in Period 3 of the Periodic Table.
What are the elements.
What are the periods in a periodic table?
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The modern periodic table is divided into which blocks?
Right or wrong sentence.
The modern periodic table has 1 to 7 periods.
Right or wrong sentence.
The K and L shells of the elements Na and Mg contain electrons.
Distinguish between:
Group 17 - Group 18
Explain structure of modern periodic table in short.
The scientist who propounded the modern periodic law is ______.
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:
The three elements A, B and C with similar properties have atomic masses X, Y and Z respectively. The mass of Y is approximately equal to the average mass of X and Z. What is such an arrangement of elements called as? Give one example of such a set of elements.
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 periods of modern periodic table.
Name the non-metals in the first twenty elements.
What is the general name of the last elements of the Periodic Table?
Answer the following in respect of element \[\ce{_16^32S}\].
Give its electronic configuration.
Match the atomic number with the following:
A rare gas.
