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प्रश्न
Group 1 and 2 : s block : : group 13 and 18 : _______
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उत्तर
Group 1 and 2 : s block : : group 13 and 18 : p Block
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संबंधित प्रश्न
Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?
Write the names given to the vertical columns and horizontal rows in the Modern Periodic Table. How does the metallic character of elements vary on moving down a vertical column? How does the size of atomic radius vary on moving left to right in a horizontal row? Give reason in support of your answer in the above two cases.
What is periodicity in properties of elements with reference to the Modern Periodic Table?
Why do all the elements of the same group have similar properties?
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?
where should hydrogen be placed in the modern periodic table? Give reason for your answer.
The modern periodic table was prepared by ______.
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 a period in a periodic table?
What is the usual number of valence electrons and valency of group 18 elements 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.
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 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.
Define:
Periodic table
Correct the statement.
Transition elements are placed at extreme right of the periodic table.
An element barium has atomic number 56. Look up its position in the periodic table and answer the following question.
What will be the formula of its phosphate?
What is meant in the periodic table by a period?
Name and state the following with reference to the elements of the first three periods of the periodic table.
A covalent compound formed by an element in period 2 and a halogen.
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?
Name the cation and the anion in the salt – calcium sulphate
Give the symbol and valency of the following element and radical.
Calcium
Give the chemical formula of sodium sulphite
Group 13 to 18 : p block : : _______ : d block
Distinguish between:
Group 17 - Group 18
Noble gases belong to______ group of the periodic table.
Element ‘X’ forms a chloride with the formula XCl2, which is solid with a high melting point. X would most likely be in the same group of the periodic table as: ______
Where would you locate the element with electronic configuration 2,8 in the Modern Periodic Table?
Which of the following elements will form an acidic oxide?
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.
Group 16 elements are collectively called as ______.
______ group elements are called alkaline earth metals.
Spot the error:
The elements of group 13 are called the carbon family.
State the group and period, of the element having three shells with three electrons in valence shell.
Name the non-metals in the first twenty elements.
Give reason for the following:
Inert gases do not form ion.
