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May 2025

Home2025May

What do you understand by isoelectronic species? Name a species that will be isoelectronic with each of the following atoms or ions. (i) F– (ii) Ar (iii) Mg2+ (iv) Rb+

🔷 What are Isoelectronic Species? ✅ Isoelectronic species are atoms or ions that have the same number of electrons, and...

How do atomic radius vary in a period and in a group? How do you explain the variation?

🔷 Variation of Atomic Radius in a Period (Left to Right): ✅ Trend:Atomic radius decreases across a period. 🧠 Why?...

What does atomic radius and ionic radius really mean to you?

🔷 1. Atomic Radius – परमाण्विक त्रिज्या: Meaning:Atomic radius is the distance from the center of the nucleus to the...

Why do elements in the same group have similar physical and chemical properties?

🔷 Explanation: 🔹 Same Valence Electron Configuration For example, all elements in Group 1 have the configuration ns¹, meaning they...

Which element do you think would have been named by (i) Lawrence Berkeley Laboratory (ii) Seaborg’s group?

🔹 (i) Element named by Lawrence Berkeley Laboratory: ✅ Berkelium (Bk) Atomic number: 97 Named after: Berkeley, California, where the...

Write the atomic number of the element present in the third period and seventeenth group of the periodic table.

🔍 Step-by-step: Third period elements range from atomic number 11 (Na) to 18 (Ar). Group 17 elements are the halogens,...

In terms of period and group where would you locate the element with Z =114?

To locate the element with atomic number Z = 114 in terms of period and group, let’s follow the principles...

On the basis of quantum numbers, justify that the sixth period of the periodic table should have 32 elements.

To justify why the 6th period of the periodic table has 32 elements, we can use the concept of quantum...

What is the basic difference in approach between the Mendeleev’s Periodic Law and the Modern Periodic Law?

The basic difference in approach between Mendeleev’s Periodic Law and the Modern Periodic Law lies in the fundamental property used...

Which important property did Mendeleev use to classify the elements in his periodic table and did he stick to that?

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What is the basic theme of organisation in the periodic table?

“तत्त्वों के गुणधर्म उनके परमाणु क्रमांक के आवर्त फलन होते हैं।”(The properties of elements are a periodic function of their...
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