Advertisements
Advertisements
प्रश्न
Find the correlation:
Group 13 to 18 : p block : : ______ : d block
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
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?
What is periodicity in properties of elements with reference to the Modern Periodic Table?
State modern periodic law.
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.
Give alongside is a part of the periodic table :
As we move horizontally from left to right:
| Li | Be | B | C | N | O | F | |
| Na | Mg | Al | Si | P | S | Cl |
(i) What happens to the metallic character of the elements?
(ii) What happens to the atomic size?
How do the atomic radii of elements change as we go from left to right in a period of the periodic table?
What are the merits of the modern periodic table of elements?
What are the periods in a periodic table? Give two characteristics of each.
State the term
The tabular arrangement of elements in horizontal rows and vertical columns _________
What are horizontal rows and vertical columns in a periodic table known as?
How does the electronic configuration of an atom relate to its position in the modern periodic table?
How many periods and groups are there in the modern periodic table?
How does number of (i) valence electrons (ii) valency; vary on moving from left to right in the second period of a periodic table?
The horizontal rows in a periodic table are called _____.
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.
Zinc
Give the chemical formula of sodium hydroxide
Find the correlation:
Mendeleev’s periodic table : atomic mass : : Modern periodic table : _______
The K and L shells of the elements Na and Mg contain electrons.
Write an Explanation.
Period
Write scientific reason.
Lithium and sodium are included in the same group in periodic table.
In the modern periodic table, the positions of 1 to 20 elements are shown here. Identify the elements A and B. Write their atomic number.
What are groups and periods in the modern periodic table?
______ is the longest period in the periodical table.
______ forms the basis of the modern periodic table.
The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belong to the same group?
Which one of the following elements exhibit maximum number of valence electrons?
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.
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?
Compare the radii of two species X and Y. Give reasons for your answer.
- X has 12 protons and 12 electrons
- Y has 12 protons and 10 electrons
Spot the error:
The elements of group 13 are called the carbon family.
An element ‘M' has 50% of the electrons filled in the 3rd shell as in the 2nd shell. The atomic number of ‘M’ is ______.
Name two elements that you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
Match the atomic number with the following:
An element of group 2.
