Subject: General Science
Book: NCERT Science Class 10
Elements are arranged in a systematic manner based on their properties.
- **Early Classification**:
- Dobereiner’s Triads.
- Newlands’ Law of Octaves.
- **Modern Periodic Table** (Mendeleev and Moseley):
- Elements arranged in increasing atomic number.
- Groups (columns) and Periods (rows).
- Predicts properties of elements.
- **Trends in the Periodic Table**:
- Atomic size, Electronegativity, Metallic & Non-metallic properties.
**Possible Exam Questions:**
1. Explain Mendeleev’s Periodic Law and its limitations.
2. What are Dobereiner’s Triads? Give an example.
3. How do atomic size and electronegativity change across a period?
4. What is the significance of the modern periodic table?
5. How does the reactivity of metals and non-metals change in a group?
Which element has the highest electrical conductivity?
View QuestionWhich particle is responsible for the negative charge of an atom?
View QuestionWhat is the main component of natural gas?
View QuestionWhich law states that energy cannot be created or destroyed?
View QuestionWhich scientist is known for the laws of motion?
View QuestionWhich is the smallest bone in the human body?
View QuestionWhich of the following is a fundamental force in nature?
View QuestionWhat type of macromolecule is an enzyme?
View QuestionWhat is the most abundant element in the universe?
View QuestionWhich part of the brain is responsible for balance and coordination?
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