Class 10 Science 1 Chapter 2 Periodic Classification of Elements Worksheet
Practise Maharashtra State Board Class 10 Science 1 Chapter 2 Periodic Classification of Elements with MCQs, short answers, scientific reasons, table-based questions, periodic trends and important questions based on the SSC Board examination pattern.
Class 10 Periodic Classification Worksheet
This Class 10 Science 1 Periodic Classification worksheet is prepared for Maharashtra State Board students who want organised practice for school examinations, preliminary examinations and the SSC Board examination. It works as a chapter-wise Maharashtra SSC Science question bank covering the important concepts and question formats from Chapter 2.
The worksheet includes questions on Dobereiner’s triads, Newlands’ Law of Octaves, Mendeleev’s periodic table, the modern periodic law, groups, periods, electronic configuration, valency, atomic size and metallic and non-metallic character. Students also practise identifying the position of an element from its atomic number or electronic configuration.
Selected questions asked in previous Maharashtra SSC Board examinations are marked with their examination years wherever applicable. Similar questions are added to help students apply the same concepts in unfamiliar situations. This makes the worksheet useful for Maharashtra State Board Class 10 Science 1 question-paper practice and last-minute board-exam revision.
SSC Board Questions
Selected previous Maharashtra Board questions are included with their examination-year references.
Different Question Types
Practise MCQs, odd-one-out, scientific reasons, comparisons, tables and descriptive answers.
Answer Key Included
Check your answers after independently completing all sections of the worksheet.
What Is Included in This Worksheet?
- Multiple-choice questions with options placed clearly on separate lines.
- Fill-in-the-blanks and one-word answer questions.
- True-or-false questions based on periodic laws and trends.
- Match-the-pairs and odd-one-out questions.
- Give-scientific-reason questions important for SSC examinations.
- Very short answers based on definitions and periodic laws.
- Short answers comparing different systems of classification.
- Long answers explaining periodic-table development and trends.
- Electronic-configuration and element-position questions.
- Periodic-table and tabular-data interpretation questions.
- Selected previous SSC Board questions with examination years.
- Additional board-exam-style questions and an answer key.
Important Concepts Covered
Dobereiner’s Triads
Dobereiner arranged certain elements with similar properties in groups of three. In a suitable triad, the atomic mass of the middle element was approximately equal to the average atomic masses of the first and third elements. Students practise identifying valid triads and explaining the limitation of this classification.
Newlands’ Law of Octaves
Newlands arranged elements in increasing order of atomic mass and observed that the properties of every eighth element were similar to those of the first. The worksheet includes questions on the law, its examples and its limitations when applied to heavier elements.
Mendeleev’s Periodic Table
Mendeleev arranged elements mainly according to increasing atomic mass and similar chemical properties. He left gaps for undiscovered elements and predicted their properties. Students compare the merits of his table with difficulties involving hydrogen, isotopes and certain pairs of elements.
Modern Periodic Law
The modern periodic law states that the properties of elements are periodic functions of their atomic numbers. The modern periodic table has seven periods and eighteen groups. Students practise locating elements by using atomic number and electronic configuration.
Groups, Periods and Electronic Configuration
The period number generally indicates the number of occupied electron shells. Elements in the same main group have similar valence-electron arrangements and therefore show similar chemical properties. Students determine the group, period and valency of common elements.
Periodic Trends
Atomic size generally decreases from left to right across a period because nuclear charge increases while electrons enter the same outer shell. Atomic size increases down a group because an additional shell is added. Metallic character generally decreases across a period and increases down a group.
How to Answer Periodic-Table Questions
- Write the atomic number of the given element.
- Write its electronic configuration correctly.
- Count the occupied shells to identify the period.
- Use the number of valence electrons to determine the group.
- Determine whether the element tends to lose, gain or share electrons.
- Compare atomic size and metallic character using the correct periodic trend.
- Give a scientific reason instead of writing only the trend.
- Check the position using the modern periodic table.
Benefits of Practising This Worksheet
- Provides Maharashtra SSC Science question-bank practice.
- Improves understanding of the development of the periodic table.
- Builds confidence in finding groups, periods and valency.
- Provides practice with previous board-exam questions.
- Helps students explain periodic trends using scientific reasons.
- Improves table-reading and electronic-configuration skills.
- Supports school tests, prelims and SSC Board preparation.
Common Mistakes Students Should Avoid
- Do not confuse atomic number with atomic mass.
- Do not use atomic mass as the basis of the modern periodic table.
- Do not confuse horizontal periods with vertical groups.
- Do not identify the period without writing the electronic configuration.
- Do not state a periodic trend without giving its reason.
- Do not write that atomic size increases across a period.
- Do not assume that every set of three elements forms a Dobereiner triad.
- Use the correct terms: metallic character, non-metallic character and valency.
Check Your Answers with Chapter 2 Solutions
Attempt every question independently before checking the answers. After completing the worksheet, use the Chapter 2 solutions to verify your explanations, comparisons, electronic configurations and periodic trends.
View Chapter 2 Solutions →Frequently Asked Questions
Select any question to read its explanation.
What questions are included in this worksheet?
Does it include Maharashtra Board questions?
What is the basis of the modern periodic table?
How many groups and periods are present?
How is the period of an element identified?
Why does atomic size decrease across a period?
When should students check the solutions?
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