\[{{N}_{0}}/2\] atoms of X(g) are converted into \[{{X}^{+}}(g)\] by energy E. \[{{N}_{0}}/2\] atoms of X(g) are converted into \[{{X}^{-}}(g)\] by energy \[{{E}_{2}}\]. Hence, ionization potential and electron affinity of X(g) are
Radius of Cl atoms is \[0.99\,\overset{\text{o}}{\mathop{\text{A}}}\,,\] while that of \[C{{l}^{+}}\] ion is \[1.54\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
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B)
Radius of Cl atoms is \[0.99\,\overset{\text{o}}{\mathop{\text{A}}}\,,\] while that of Na atom is \[1.54\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
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C)
Radius of Cl atoms is \[0.99\,\overset{\text{o}}{\mathop{\text{A}}}\,,\]while that of \[C{{l}^{-}}\] ion is \[0.81\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
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D)
Radius of Na atoms is \[0.99\,\overset{\text{o}}{\mathop{\text{A}}}\,,\] while that of \[N{{a}^{+}}\] ion is \[1.54\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
A, B and C are hydroxy compounds of the elements P, Q and R respectively. P, Q and R are in the same period of the periodic table. A gives an aqueous solution of \[pH>7\]. B reacts with both strong acids and strong alkalies. C gives an aqueous solution which is strongly alkaline. Which of the following statement(s) is/are true?
I. All the three elements are metals.
II. The atomic radius decreases in the order P, Q, R.
III. The electron negativities decrease from P to Q to R.
IV. P, Q and R could be \[P,Al\] and Na respectively.
The atomic numbers of vanadium (V), chromium (Cr), manganese (Mn) and iron (Fe) are, respectively 23, 24, 25 and 26. Which one of these may be expected to have the highest second ionisation enthalpy?
When an isolated gaseous cation \[{{X}^{+}}(g)\] is converted into \[{{X}^{-}}(g)\] anion, the amount of energy released is 16.8 eV. Calculate the electro negativity value of the atom X on Pauling's scale.
The electronic configuration of an element is \[1{{s}^{2}},\text{ }2{{s}^{2}}2{{p}^{6}},\text{ }3{{s}^{2}}3{{p}^{4}}\]. The atomic number of the element present just below the above element in the periodic table -
The gaseous HX molecule has a measured dipole moment of 4.0 D, which indicates that it is a very polar molecule. The separation between the nuclei in this molecule is \[2.67\times {{10}^{-8}}cm\] then the percentage ionic character in HX molecule:
A compound AB whose electro negativity difference is 1.9. Atomic radius of A and B are 4 and \[2\,\overset{\text{o}}{\mathop{\text{A}}}\,\]. The distance between A & B means \[{{d}_{A-B}}\] is
The \[I{{P}_{1}},\,\,I{{P}_{2}},\,\,I{{P}_{3}},\,\,I{{P}_{4}}\] and \[I{{P}_{5}}\] of an element are 7.1, 14.3, 34.5, 46.8, 162.2eV respectively. The element is likely to be
Match List I (atomic number of the element) with List II (position in the periodic table) and select the correct answer using the codes given below the lists -
In the modern periodic table, the block indicates the value of .......... for the last subshell that received electrons in building up the electronic configuration. Fill in the blank with appropriate option.
How many elements would be in the second period of the Periodic Table if the spin quantum number \[{{m}_{s}}\] could have the value \[-\frac{1}{2},\,0,\,+\frac{1}{2}\]?