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Class 9 chemistry chapter 4 mcqs

Class 9 chemistry chapter 4 mcqs are specially designed for students and those people who are preparing for competitive exams class 9 chemistry mcqs online mcqs

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1. 
What is the atomic mass of lithium's
2. 
What is the atomic mass of sodium?
3. 
What is the atomic mass of potassium?
4. 
What is the atomic mass of chlorine?
5. 
What is the atomic mass of bromine ?
6. 
What is the atomic mass of iodine ?
7. 
When was Mendeleev table presented ?

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