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Solutions 5. Periodic Classification of Elements - Chapter Review | Class 10 Science - Toppers Study

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Solutions 5. Periodic Classification of Elements - Chapter Review | Class 10 Science - Toppers Study

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Chapter 5 Science class 10

Chapter Review class 10 Science Chapter 5. Periodic Classification of Elements

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Solutions 5. Periodic Classification Of Elements - Chapter Review | Class 10 Science - Toppers Study
Class 10 Ncert Solutions
Solution Chapter 5. Periodic Classification Of Elements Class 10
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Chapter 5. Periodic Classification Of Elements Chapter Review Class 10

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5. Periodic Classification of Elements

| Chapter Review |

Solutions 5. Periodic Classification of Elements - Chapter Review | Class 10 Science - Toppers Study

Chapter Review:

Groups having three elements each. So he called these groups called triads.
According to Dobereiner's Traids "The order of increasing atomic masses; the atomic mass of the middle element was roughly the average of the atomic masses of the other two elements".
According to Newlands’ Law of Octaves "Every eighth element repeat the properties of the first element".
Newlands’ Law of Octaves worked well with lighter elements only.
When Mendeleev started work on Periodic Table, oniy 63 elements were known.
The Modern Periodic Table has 18 vertical columns known as ‘groups’
and 7 horizontal rows known as ‘periods’.
The Modern Periodic Law state that ‘Properties of elements are a periodic function of their atomic number.’
The valency of an element is determined by the number of valence electrons present in the outermost shell of its atom.
The atomic size may be visualised as the distance between the centre of the nucleus and the outermost shell of an isolated atom.
The atomic radius decreases in moving from left to right along a period. This is due to an increase in nuclear charge which tends to pull the electrons closer to the nucleus and reduces the size of the atom.
Boron, silicon, germanium, arsenic, antimony, tellurium and polonium are intermediate in properties and are called metalloids or semi metals.

Other Pages of this Chapter: 5. Periodic Classification of Elements

1. Chapter 5. Periodic Classification of Elements | Chapter Review

2. Chapter 5. Periodic Classification of Elements | Text-book Questions

3. Chapter 5. Periodic Classification of Elements | Exercise

4. Chapter 5. Periodic Classification of Elements | Additional Questions With Solutions

5. Chapter 5. Periodic Classification of Elements | Additional Questions With Solutions

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