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why d-block elements elements are called as outer transition elements and f-block elements as inner transition elements?
The d-block elements are called transition metals and have valence electrons in d orbitals. The inner transition elements are those who have their last 3 shells incompletely filled. The f...
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The positions of K and Ar,Co and Ni do not remain anomalous any longer since --------- is used in arranging the elements.
In the modern Periodic Table the chemical elements are arranged in order of increasing atomic number, therefore the positions of K and Ar,Co and Ni are not anomalous anymore.
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4. From their positions in the periodic table, predict the common oxidation number for each of the following elements in binary compounds: Cl, Li, Mg, S, Cs, Al, O, and Ca. explain your answers.
Cl -1Li 1Mg +2S 6Cs +1Al +3O -2Ca +2
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Natural boron is composed of two isotopes: 19.78% boron-10 (atomic mass = 10.0129 amu) and 80.22% boron-11 (atomic mass = 11.0093 amu). What is the average atomic mass of naturally occurring boron?
Average atomic mass=(19.78%*10.0129amu + 80.22%*11.0093amu)/100%=10.8122amu
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A mass spectrometer computed the atomic mass ratio of fluorine to carbon - 12 as 1.5832 - to - 1 . If the atomic mass of carbon - 12 is 12 u ( exactly ) , what is the atomic mass of fluorine in u ?
Atomic mass of fluorine=18.998 u
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Atomic and ionic radii of the elements of group 16 are smaller than those of the corresponding elements of group 15 and increases down the group. Why?
The atomic radius of group-16 elements or oxygen family are smaller than that of group-15 elements. This is due to increase in the effective nuclear charge from group-15 elements which...
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What charge are group 7 elements most likely to take when they form ionic bonds?
Elements 7 groups have the outer energy level electrons 7; to complete the outer level they lack one electron, so due ionic compounds with these elements accept one electron, with...
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Is Ba(CN)2 ionic or covalent? Is I2F7 ionic or covalent? Is vanadium(III)sulfate ionic or covalent? Is SeF4 ionic or covalent? Is NH4CI ionic or covalent?
Ionic bond forms between the metal and nonmetal. Covalent bond forms between 2 nonmetals with different electronegativity. Ba(CN)2 – ionic I2F7 – covalent V(SO4)3 – ionic SeF4 – covalent NH4Cl...
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For a given arrangement of ions, the lattice energy increases as ionic radius _________ and as ionic charge __________.
For a given arrangement of ions, the lattice energy increases as ionic radius deceases and as ionic charge increases.
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how much distance will a 2c charge particle of mass 10g from a charge body of 4c charge and 10g mass. if they are seperted by 2mm and the 1st particle move.
What is the electrostatic force exerted between two charged spheres at a distance of 5 nanometers if the first sphere has a charge of -5
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