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प्रश्न
Find the correlation:
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
Explanation:
The modern periodic table is divided into blocks based on the orbital being filled by the valence electrons:
- s-block: Includes Groups 1 and 2, where the last electron enters the s-orbital.
- p-block: Includes Groups 13 to 18, where the last electron enters the p-orbital.
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संबंधित प्रश्न
Fill in the blank:
The modern periodic table consists of ……………. periods.
How many periods and groups are there in the long form of periodic table?
On which side of the periodic table will you find non-metals?
Explain why, the noble gases are placed in a separate group.
How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
What is the number of elements is 1st period the modern periodic table?
Helium and neon are unreactive gases. What, if anything, do their atoms have in common?
What are the groups 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.
The atomic numbers of the three elements X, Y and Z are 2, 6 and 10 respectively.
(i) Which two elements belong to the same group?
(ii) Which two elements belong to the same period?
Give reasons for your choice.
Give the group number of following elements present in periodic table
Name the scientist who stated the modern periodic law.
Name two elements in halogens.
Name the metals in the first twenty elements.
Name the type of elements which have outermost shell incomplete.
Answer the following in respect of element `31/15 P `
To which group and period does it belong?
Write the number of protons, neutrons and electronic configuration of \[\ce{_19^39K, _15^31P}\]. Also state their position in periodic table.
Answer the following in respect of element `31/15 P`
Give its electronic configuration
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What is the number of elements in the 3rd period, of the modern periodic table?
The horizontal rows in a periodic table are called _____.
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Give the symbol and valency of the following element and radical.
Sulphur [Sulphide]
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
Name the following:
The group of the Modern Periodic Table to which calcium [Ca2+] belongs.
State the number of elements in Period 2 of the Periodic Table.
What are the elements.
How were elements arranged in the long form of the periodic table or the Modern Periodic Table?
What are the periods in a periodic table?
Find the odd one out and give its explanation.
p-block is composed of groups 1 and 2.
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
Group 16 elements are collectively called as ______.
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:
E and B
Answer the following in respect of element \[\ce{_16^32S}\].
To which group and period does it belong?
Match the atomic number with the following:
A rare gas.
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).
Boron, Aluminium, Gallium, Indium, Thallium
Answer the following question in relation to the above group of elements:
If the electronic configuration of aluminium is 2, 8, 3, how many electrons are there in the outer shell of thallium?
