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Short Tricks: To Find "Group & Period" Number of Any Element Video Lecture | Chemistry Class 11 - NEET

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FAQs on Short Tricks: To Find "Group & Period" Number of Any Element Video Lecture - Chemistry Class 11 - NEET

1. How can I determine the group number of an element?
Ans. To determine the group number of an element, you need to look at its electron configuration. The group number is equal to the number of valence electrons an element has. For example, if an element has 5 valence electrons, it belongs to group 5.
2. How do I find the period number of an element?
Ans. The period number of an element is determined by its highest energy level or principal quantum number. You can find the period number by looking at the highest value of n in the element's electron configuration. For instance, if an element's electron configuration ends with 3p, it belongs to period 3.
3. Can an element have a group number greater than 18?
Ans. No, an element cannot have a group number greater than 18. The periodic table is divided into 18 groups, and each group represents the number of valence electrons an element possesses. Elements with more than 18 valence electrons would require additional energy levels, making them part of a different period rather than a higher group.
4. How many elements are there in each period of the periodic table?
Ans. The number of elements in each period of the periodic table corresponds to the number of orbitals available in that energy level. The first period consists of only two elements (hydrogen and helium), the second period has eight elements, the third period has 18 elements, and so on. The maximum number of elements in any period is 32, which occurs in the seventh period.
5. What is the significance of group and period numbers in the periodic table?
Ans. Group and period numbers in the periodic table provide valuable information about an element's properties. Elements in the same group have similar chemical behaviors due to their identical number of valence electrons. On the other hand, elements in the same period have the same number of energy levels. These numbers help in predicting an element's reactivity, atomic size, and other characteristics.
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