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Q. Explain about Atomic Radius?
The atomic size decreases with increase in atomic number along any period in the long form of the periodic table due to increase in effective nuclear charge. Though, the decrease in atomic radius is small when the difference in electronic configuration from one element to the next is that of an additional inner electron. This is due the additional inner electron screens the size-determining outer electrons from the nucleus much better than an additional outer electron. For example, decrease in the covalent radius from Sc to Zn; i.e., across ten elements of the 3d transition series, is 19 pm. this. Decrease is almost one-third of the decrease in the covalent radius of the seven elements of s and p blocks of the period 3.
Originally, chewing gum was made from the latex sap of the sapodilla tree (native to Central America). This sap was known as chicle. Other natural gum bases may be used, such as je
explain galvanic potentiol differnce
Cathode rays have
Q. Illustrate Oxidation States of f-block? The addition of the first three ionisation energies of the lanthanides is comparatively low, so the elements are highly electropositi
Field processing Certain processing techniques at the field itself could help to reduce the chances of spoilage of the fresh produce, specially during transportation. Fruits a
what is indicators?explain theories of indicators?
Another way to show that water pressure increases with depth Search a tall tin can. Punch holes up the side of the can about 3 cm apart. Put a strip of adhesive or plastic tape
#question.affect of solvent on rate reaction
The spectrum of He is expected to be similar to: (1) H (2) Li + (3) Na (4) He + Ans: Li +
Q. Explain about Thiosulphuric Acid? Thiosulphuric acid, H 2 S 2 0 3 , has never been isolated but its salts are well known which contain the thiosulphate ion, S 2 O 2- 3 . Th
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