Advertisements
Advertisements
Question
The d-block elements are called as ______ elements.
Options
transition
metalloid
normal
inner transition
Advertisements
Solution
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.
APPEARS IN
RELATED QUESTIONS
Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?
The position of three elements A, B and C in the Periodic Table are shown below –
|
Group 16
|
Group 17
|
|
−
|
−
|
|
−
|
A
|
|
−
|
−
|
|
B
|
C
|
(a) State whether A is a metal or non-metal.
(b) State whether C is more reactive or less reactive than A.
(c) Will C be larger or smaller in size than B?
(d) Which type of ion, cation or anion, will be formed by element A?
In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?
Write the merits of the modern periodic table over Mendeleev’s Periodic table
Fill in the following blank with suitable word:
The basis for modern periodic table is ...............
How were the positions of cobalt and nickel resolved in the modern periodic table?
The modern periodic table was prepared by ______.
What is the usual number of valence electrons in the atoms of the last element in a period?
State how the valency of elements varies in a period of the periodic table?
What is a period in a periodic table?
Explain why, the first period of the periodic table has only two elements whereas second period has eight elements
(b) What is the number of elements is 3rd period, the modern periodic table?
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 two elements in each case: Lanthanides
Name the metals in the first twenty elements.
The electronic configuration of an element T is 2, 8, 8, 1.
What is the group number of T?
From the standpoint of atomic structure, what determines which elements will be the first and which the last in a period of the periodic table?
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.
Chlorine [Chloride]
Give the symbol and valency of the following element and radical.
Oxygen [Oxide]
Give the symbol and valency of the following element and radical.
Bicarbonate
Give the symbol and valency of the following element and radical.
Carbonate
Give the symbol and valency of the following element and radical.
Sulphate
What are the periods in a periodic table?
p-block is composed of groups 1 and 2.
Distinguish between:
s-block - p-block
Elements in the modern periodic table are arranged in ______groups and______ periods.
The arrangement of elements in the Modem Periodic Table is based on their ______
Which of these belong to the same period?
| Element | A | B | C |
| Atomic number | 2 | 10 | 5 |
The amount of energy released when one or more electrons is added to the neutral atom is ______
The inert gas which lies in the third period is ______
Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?
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.
Arrange the following elements in the increasing order of their metallic character
| Mg, | Ca, | K, | Ge, | Ga |
Spot the error:
There are 5 periods and 17 groups in the modern periodic table.
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
An element belonging to 3d series of modern periodic table has spin magnetic moment = 5.92 B.M. in +3 oxidation state. The atomic number of elements are ______.
Name two elements that you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
