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why they have low electronegativity?
Q. Determine Atomic Number and Mass Number? One of the four naturally taking place isotopes of chromium has a mass number of 53. Determine the number of electrons, protons and
1.which of the following is f-block element /
What is the foundation of classification of cold and hot working? Cold and hot working: Changing the shape of material by extrusion, forging, rolling, drawing involves pl
The electron density between 1s and 2s orbital is : (1) High (2) Low (3) Zero (4)None of these Ans:Zero
why alkane are less rective then alkene?
The model of trans-bicyclo decane The model of trans-bicyclo[5.3.0]decane is easier to build. The larger is a ring, the easier it is to compress the dihedral angle of the tran
Line Spectru- A emission spectrum that contains very sharp peaks (Prism Like Structure) , corresponding to transitions between states in free atoms.For example, the line spectrum o
Q. Characteristics of food texture? Hardness: It is defined as the force necessary to affect a given deformation. When judged by human senses, it is the force required to pen
Ionization energy of group: Why does Ionization energy of group IIA elements decrease from Be to Ra? A. As the atomic size increases from Be to Ra, the attraction between
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