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How many unpaired electrons are present in Ni 2+ cation (atomic number = 28): (1) 0 (2) 2 (3) 4 (4) 6 Ans: 2
what element is not grouped with others in a family? what is its usual atomic structure?
A covalent bond between two atoms is formed by which of the following: (1) Electron nuclear attraction (2) Electron sharing (3) Electron transfer (
How are standard solutions and titrations prepared in industry?
Why is the total energy of a many-electron atom not equivalent to the sum of the orbital energies for every electron?
Q. Consider a hypothetical system in which two aqueous solutions are separated by a semiper- meable membrane. Solution ? is prepared by dissolving 1.00 x 10 -5 mol KCl in 10.0 g
Which of the following set of quantum numbers belong to highest energy: (1) n=4, l=0, m=0, s= +1/2 (2) n=3, l=0, m=0, s= +1/2 (3) n=3 l=1, m=1, s
Which of following carbon has sp3 hybriziation for bond formation.??? Ch3,c2h6,(ch3)3cho
(i) Use valence shell electron pair repulsion theory (VSEPR) to predict the shape of the molecule comprising oxygen, nitrogen and fluorine atoms, which has the formula ONF, and whe
What are laws of crystallography? How does it help in study of crystal structure
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