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ATOMS AND MOLECULES PART3 CRISS CROSS METHOD Class9th chemistry real explore academy
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Today, we're diving into the fascinating world of chemistry to learn how to write chemical formulas using the criss-cross method and understand valency. Let’s get started! • [What is Valency?] • First, let's talk about valency. Valency is the measure of an atom's ability to combine with other atoms. It depends on the number of electrons an atom can donate or accept to achieve a stable electronic configuration, usually resembling that of the nearest noble gas. • [Understanding Valency with Examples] • For example, oxygen has a valency of 2 because it needs 2 electrons to complete its outer shell. Hydrogen, on the other hand, has a valency of 1 because it needs just one electron to complete its outer shell. • [Introduction to the Criss-Cross Method] • Now, let’s discuss the criss-cross method. This method is a simple way to write the chemical formulas of compounds. Here’s a step-by-step guide: • Identify the valency of each element in the compound. • Write down the symbols of the elements involved. • Criss-cross the valency numbers to get the subscripts for each element. • [Tips and Tricks] • Here are a few tips: • Always reduce the subscripts to their simplest form if possible. • Double-check your work to ensure the total valency balances out to zero in the compound.Conclusion] • And that’s it! You’ve learned how to use the criss-cross method to write chemical formulas and understand valency. • If you found this video helpful, don’t forget to like, subscribe, and hit the notification bell for more chemistry tips. Thanks for watching, and see you next time! • Trending hashtags • #StudyWithMe • #StudyTips • #Productivity • #StudentLife • #StudyRoutine • #ExamPreparation • #StudyGoals • #FocusAndStudy • #StudyMotivation • #OnlineLearning
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