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In a potassium atom, electronic energy levels are in the following order: (1) 4s>3d (2) 4s>4p (3) 4s (4) 4s Ans: 4s
copper reacts with oxygen to form two oxide X and Y .On analysis 1.535g of X yielded 1.365g of copper and 1.450g of Y yielded 1.160g of copper. [I] determine the chemical formula o
Borosilicate glass: in this boric anhydride is used in place of lime. This glass generally contains 75-81% silica, 10-13.5% B 2 O 3 , 4.5-6% Na 2 O and 2-5% Al 2 O 3 . Sometimes Z
the reaction of ammonium chloride with sulphuric acid
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 an acid
Q. Transition elements of the f-block? The salient features of the chemistry of the transition elements of the f-block. Due to filling of electrons in the f-orbitals of an inne
Physical properties of Nitro alkanes or Nitroparaffins (1) Nitro alkanes are colourless, pleasant smelling liquids. (2) These are sparingly soluble in water but enthusiastic
The only nonradioactive isotope of fluorine has 9 protons and 10 neutrons. a. What is its mass number. b. Write the full symbol of this atom.
Q. What are the Properties of Nitrogen? Ans. Physical Properties of Nitrogen Nitrogen is a colorless, odorless and tasteless gas. It is particularly unreactive at roo
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