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Chapters
2: Acids, Bases and Salts
3: Metals and Non-metals
4: Carbon and its Compounds
▶ 5: Periodic Classification of Elements
6: Life Processes
7: Control and Coordination
8: How do Organisms Reproduce?
9: Heredity and Evolution
10: Light – Reflection and Refraction
11: The Human Eye and the Colourful World
12: Electricity
13: Magnetic Effects of Electric Current
14: Sources of Energy
15: Our Environment
16: Sustainable Management of Natural Resources
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Solutions for Chapter 5: Periodic Classification of Elements
Below listed, you can find solutions for Chapter 5 of CBSE NCERT for Science [English] Class 10.
NCERT solutions for Science [English] Class 10 5 Periodic Classification of Elements Intext Questions [Page 81]
Did Dobereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.
What were the limitations of Dobereiner’s classification?
What were the limitations of Newlands’ Law of Octaves?
NCERT solutions for Science [English] Class 10 5 Periodic Classification of Elements Intext Questions [Page 85]
Use Mendeleev’s Periodic Table to predict the formulae for the oxides of the following elements:
K, C, Al, Si, Ba.
Besides gallium, which other elements have since been discovered that were left by Mendeleev in his Periodic Table? (any two)
What were the criteria used by Mendeleev in creating his Periodic Table?
Why do you think the noble gases are placed in a separate group?
NCERT solutions for Science [English] Class 10 5 Periodic Classification of Elements Intext Questions [Page 90]
How could the Modern Periodic Table remove various anomalies of Mendeleev’s Periodic Table?
Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?
Name three elements that have a single electron in their outermost shells.
Name two elements that have two electrons in their outermost shells.
Name three elements with filled outermost shells.
Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements?
Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common?
In the Modern Periodic Table, which are the metals among the first ten elements?
By considering their position in the Periodic Table, which one of the following elements would you expect to have maximum metallic characteristic?
Ga
Ge
As
Se
Be
NCERT solutions for Science [English] Class 10 5 Periodic Classification of Elements Exercises [Pages 91 - 92]
Which of the following statements is not a correct statement about the trends when going from left to right across the periods of periodic Table.
The elements become less metallic in nature.
The number of valence electrons increases.
The atoms lose their electrons more easily.
The oxides become more acidic.
Element X forms a chloride with the formula XCl2, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as
Na
Mg
Al
Si
Name the element that has two shells, both of which are completely filled with electrons.
Which element has the electronic configuration 2, 8, 2?
Which element has a total of three shells, with four electrons in its valence shell?
Which element has a total of two shells, with three electrons in its valence shell?
Which element has twice as many electrons in its second shell as in its first shell?
What property do all elements in the same column of the Periodic Table as boron have in common?
What property do all elements in the same column of the Periodic Table as fluorine have in common?
An atom has electronic configurations 2, 8, 7.
What is the atomic number of this element?
An atom has electronic configurations 2, 8, 7.
To which of the following elements would it be chemically similar? (Atomic numbers are given in parentheses.)
N(7)
F(9)
P(15)
Ar(18)
The position of three elements A, B and C in the Periodic Table are shown below –
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Group 16
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Group 17
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A
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B
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C
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(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?
Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the Periodic Table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?
How does the electronic configuration of an atom relate to its position in the Modern Periodic Table?
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?
Compare and contrast the arrangement of elements in Mendeleev’s periodic Table and the Modern Periodic Table.
Solutions for 5: Periodic Classification of Elements
NCERT solutions for Science [English] Class 10 chapter 5 - Periodic Classification of Elements
Shaalaa.com has the CBSE Mathematics Science [English] Class 10 CBSE solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. NCERT solutions for Mathematics Science [English] Class 10 CBSE 5 (Periodic Classification of Elements) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
Further, we at Shaalaa.com provide such solutions so students can prepare for written exams. NCERT textbook solutions can be a core help for self-study and provide excellent self-help guidance for students.
Concepts covered in Science [English] Class 10 chapter 5 Periodic Classification of Elements are History of Periodic Table: Early Attempts at the Classification of Elements, Dobereiner’s Triads, Newland's Law of Octaves, Periodic Properties, Mendeleev’s Periodic Table, Merits and Demerits of Mendeleev’s Periodic Table, The Modern Periodic Table, Valency, Atomic Radius Or Atomic Size, Metallic and Non-metallic Characters, History of Periodic Table: Early Attempts at the Classification of Elements, Dobereiner’s Triads, Newland's Law of Octaves, Periodic Properties, Mendeleev’s Periodic Table, Merits and Demerits of Mendeleev’s Periodic Table, The Modern Periodic Table, Valency, Atomic Radius Or Atomic Size, Metallic and Non-metallic Characters.
Using NCERT Science [English] Class 10 solutions Periodic Classification of Elements exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in NCERT Solutions are essential questions that can be asked in the final exam. Maximum CBSE Science [English] Class 10 students prefer NCERT Textbook Solutions to score more in exams.
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