Chemists use symbols and formulae to represent elements ... be calculated from its atomic number and mass number. The periodic table - AQA Mendeleev made an early periodic table.

Maths Formulas for Class 10: Mathematics is one of the most difficult and important subjects. Many students love it, and many are afraid of it. Well, for those who love it, it will take the ...

Class 12th Mathematics Syllabus 2025: The CBSE Class 12 Mathematics Board Exam 2025 is scheduled to be conducted on March 8, 2025 (Saturday). With the exam approaching, having a clear ...

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Topics at this level include enolate chemistry, organophosphorus, silicon, and sulfur chemistry, the synthesis and reactivity ... It was structured in three parts, as shown in Table 2. 1 Likert scale ...

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