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Till 20elememts write the no of electrons in outermost shell.if less than 4 then this is the valency otherwise subtract from 8
The atomic number of an element is 17. The number of orbitals containing electron pairs in its valence shell is: (1) Eight (2) Six (3) Three
The frequency of radiation emitted when the electron falls from n= 4 to n=1 in a hydrogen atom will be (Given ionization energy of H = 2.18x 10 -18 J atom-1 and h= 6.625x 10-
formula for producer gas
What kind of relation is there between them and the force constants of vibration that you have calculated? The enthalpies of vaporization of carbon and silicon are 717 kJmol -1
what is the class of HS
Distilled water A kettle can be used to give boiling water, which is then condensed in a jam jar fitted with a big cork and immersed in a pan of cold water. Rubber tubing, adhe
Why the lest packing fraction havig higj of the binding energy
Doctors prescribe medicine based upon body weight. The recommended dose is 5.0 mg antibiotic per kg body weight and the antibiotic is dissolved to form a solution with a concentrat
What is the structure of a DNA molecule? Ans) The DNA molecule having of two complementary strands oriented in an anti-parallel fashion. Every strand is composed of nucleotides.
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