Periodic Classification of Element
Maharashtra Board · Class 10 · Science
Flashcards for Periodic Classification of Element — Maharashtra Board Class 10 Science. Quick Q&A cards covering key concepts, definitions, and formulas.
Interactive on Super Tutor
Studying Periodic Classification of Element? Get the full interactive chapter.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for flashcards and more.
1,000+ Class 10 students started this chapter today
What is Dobereiner's Law of Triads?
Answer
Dobereiner's Law of Triads states that when elements with similar chemical properties are arranged in groups of three (triads) in increasing order of atomic mass, the atomic mass of the middle element…
Give an example of Dobereiner's triad with calculations.
Answer
Lithium (Li), Sodium (Na), Potassium (K) form a triad. Li = 6.9, Na = 23.0, K = 39.1. Mean = (6.9 + 39.1) ÷ 2 = 46 ÷ 2 = 23.0. The calculated value matches the actual atomic mass of sodium (23.0), con…
What is Newlands' Law of Octaves?
Answer
Newlands' Law of Octaves states that when elements are arranged in increasing order of their atomic masses, every eighth element has properties similar to those of the first element. This is similar t…
What were the limitations of Newlands' Law of Octaves?
Answer
1. The law was applicable only up to calcium (atomic mass 40). 2. Newlands fitted all elements in 56 boxes (7×8), placing two elements in some boxes (Co & Ni, Ce & La). 3. Elements with different prop…
State Mendeleev's Periodic Law.
Answer
Mendeleev's Periodic Law states that 'Properties of elements are periodic functions of their atomic masses.' This means that when elements are arranged in increasing order of their atomic masses, elem…
What were the major merits of Mendeleev's Periodic Table?
Answer
1. Corrected atomic masses of some elements (like beryllium from 14.09 to 9.4). 2. Left vacant places for undiscovered elements and predicted their properties (eka-boron, eka-aluminum, eka-silicon). 3…
What were the demerits of Mendeleev's Periodic Table?
Answer
1. Ambiguity in position of cobalt and nickel (both have atomic mass 59). 2. No fixed position for isotopes with same chemical properties but different atomic masses. 3. Unpredictable gaps between hea…
State the Modern Periodic Law.
Answer
The Modern Periodic Law states that 'Properties of elements are periodic functions of their atomic numbers.' This law was proposed based on Henry Moseley's work in 1913, which showed that atomic numbe…
+14 more flashcards available
Practice AllFrequently Asked Questions
What are the important topics in Periodic Classification of Element for Maharashtra Board Class 10 Science?
How to score full marks in Periodic Classification of Element — Maharashtra Board Class 10 Science?
How many flashcards are available for Periodic Classification of Element?
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for Periodic Classification of Element
Important Questions
Practice with board exam-style questions
Syllabus
What topics to cover
Revision Notes
Key points for last-minute revision
Study Plan
Step-by-step plan to ace this chapter
Formula Sheet
All formulas in one place
Chapter Summary
Understand the chapter at a glance
Practice Quiz
Test yourself with a quick quiz
Concept Maps
See how topics connect visually
For serious students
Get the full Periodic Classification of Element chapter — for free.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for Maharashtra Board Class 10 Science.