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प्रश्न
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.
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उत्तर
On the basis of electronic configuration, elements in the modern periodic table are classified Into four blocks. Groups 1 and 2 elements are included in s-block and all these elements are metals. (except Hydrogen). Group 13 to 18 elements are included in p-block. This block contains metals, non-metals and metalloids. Group 3 to 12 elements are included in d-block and all the elements are metals elements shown at the bottom of the periodic table i.e. Lanthanides and Actinides constitute f-block and all these elements are metals.
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संबंधित प्रश्न
Compare and contrast the arrangement of elements in Mendeleev’s periodic Table and the Modern Periodic Table.
What is periodicity in properties of elements with reference to the Modern Periodic Table?
where should hydrogen be placed in the modern periodic table? Give reason for your answer.
Explain why, the noble gases are placed in a separate group.
The three elements having chemical symbols of Si, B and Ge are:
(a) all metals
(b) all non-metals
(c) all metalloids
(d) Si is metalloid, B is metal and Ge is non-metal
What is a period in a periodic table?
What happens to the number of valence electrons in the atoms of elements as we go down in a group of the periodic table?
In the modern Periodic Table, why does cobalt with higher atomic mass of 58.93 appear before nickel having lower atomic mass of 58.71?
From the standpoint of atomic structure, what determines which element will be the first and which the last in a period the periodic table?
What are the periods in a periodic table? Give two characteristics of each.
The following diagram shows a part of the periodic table in which the elements are arranged according to their atomic numbers. (The letters given here not the chemical symbols of the elements):
| a 3 |
b 4 |
c 5 |
d 6 |
e 7 |
f 8 |
g 9 |
h 10 |
|
| i 11 |
j 12 |
k 13 |
l 14 |
m 15 |
n 16 |
o 17 |
p 18 |
(i) Which element has a bigger atom, a or f?
(ii) Which element has a higher valency, k or o?
(iii) Which element is more metallic i or k?
(iv) Which element is more non-metallic, d or g?
(v) Select a latter which represents a metal of valency 2.
(vi) Select a letter which represents a non-metal of valency 2.
Correct the statement.
Transition elements are placed at extreme right of the periodic table.
Name the type of elements which have outermost shell complete.
Answer the following in respect of element `31/15 P `
To which group and period does it belong?
An element E has following electronic configuration:
|
K |
L |
M |
|
2 |
8 |
6 |
(a) To which group of the periodic table does element E belong?
(b) To which period of the periodic table does element E belong?
(c) State the number of valence electrons present in element E.
(d) State the valency of the element E.
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 _____.
Answer the following question.
How it can be proved that the basic structure of the Modern Periodic Table is based on the electronic configuration of atoms of different elements?
Give the symbol and valency of the following element and radical.
Sodium
Give the symbol and valency of the following element and radical.
Oxygen [Oxide]
Give the symbol and valency of the following element and radical.
Hydroxide
Give the chemical formula of sodium nitrate
Fill in the blank:
The element lithium in the Modern Periodic Table with valency 1+ belongs to the group ______.
The groups 1 and 2 constitute the ______ block.
Which of the following statements about the Modern periodic table is correct?
Find the odd one out and give its explanation.
Right or wrong sentence.
The modern periodic table has 1 to 7 periods.
Right or wrong sentence.
To the left of the zig-zag line in the periodic table are the metal elements.
What are groups and periods in the modern periodic table?
How does the property vary in periods and in groups?
On moving from left to right in a period in the periodic table, the size of the atom ______
Which of the following statements about the Modern Periodic Table is correct:
Which of the following is the outermost shell for elements of period 2?
Which of the following elements would lose an electron easily?
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.
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 Metalloid?
Define groups of modern periodic table.
An element has 2 electrons in its N shell.
Is it a metal or a non-metal?
