question_answer 1)
\[{{N}_{0}}/2\] 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
A)
\[\frac{2{{E}_{1}}}{{{N}_{0}}},\frac{2({{E}_{1}}-{{E}_{2}})}{{{N}_{0}}}\] done
clear
B)
\[\frac{2{{E}_{1}}}{{{N}_{0}}},\frac{2{{E}_{2}}}{{{N}_{0}}}\] done
clear
C)
\[\frac{({{E}_{1}}-{{E}_{2}})}{{{N}_{0}}},\frac{2{{E}_{2}}}{{{N}_{0}}}\] done
clear
D)
None is correct done
clear
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question_answer 2)
The first ionisation enthalpies for two isotopes of the same elements are
A)
same done
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B)
different done
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C)
some what different done
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D)
\[|{{E}_{1}}=2|{{E}_{(II\text{ isotope)}}}\] (n isotope) done
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question_answer 3)
Why is the \[{{E}^{o}}\] value of \[M{{n}^{+3}}\text{/}M{{n}^{+2}}\] couple much more positive than \[C{{r}^{+3}}/C{{r}^{+2}}\]
A)
Due to larger third ionization enthalpy of Mn done
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B)
Due larger third ionization enthalpy of Cr done
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C)
Due to smaller third ionization enthalpy of Mn done
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D)
Due to lesser hydration enthalpy of Cr done
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question_answer 4)
If the electronegativity difference between two atoms A and B is 2.0 then the percentage of covalent character in the molecule is
A)
54% done
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B)
46% done
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C)
23% done
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D)
72% done
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question_answer 5)
Select the correct statement:
A)
First ionisation potential of Mg is less than that of Al done
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B)
\[{{O}^{+}}\] has lesser electro negativity than that of \[{{O}^{-}}\] done
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C)
Electron affinity of Cl is lesser than that of F done
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D)
Second ionisation potential of O is greater than that of N done
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question_answer 6)
Atomic radii of fluorine and neon in Angstrom units are respectively given by
A)
0.72, 1.60 done
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B)
1.60, 1.60 done
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C)
0.72, 0.72 done
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D)
None of these done
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question_answer 7)
The correct order of ionic size of \[{{N}^{3-}},N{{a}^{+}},N{{a}^{+}},{{O}^{2-}},{{F}^{-}},M{{g}^{2+}}\] will be
A)
\[{{O}^{2-}}<N{{a}^{+}}<{{F}^{-}}<{{N}^{3-}}<M{{g}^{2+}}\] done
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B)
\[M{{g}^{2+}}N{{a}^{+}}<{{F}^{-}}<{{O}^{2-}}<{{N}^{3-}}\] done
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C)
\[{{F}^{-}}<{{N}^{3-}}<{{O}^{2-}}<M{{g}^{2+}}<N{{a}^{+}}\] done
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D)
\[{{F}^{-}}<M{{g}^{2+}}<{{O}^{2-}}<N{{a}^{+}}<{{N}^{3-}}\] done
clear
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question_answer 8)
Which is correct in the following?
A)
Radius of Cl atoms is \[0.99\,\overset{\text{o}}{\mathop{\text{A}}}\,,\] while that of \[C{{l}^{+}}\] ion is \[1.54\,\overset{\text{o}}{\mathop{\text{A}}}\,\] done
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B)
Radius of Cl atoms is \[0.99\,\overset{\text{o}}{\mathop{\text{A}}}\,,\] while that of Na atom is \[1.54\,\overset{\text{o}}{\mathop{\text{A}}}\,\] done
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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 \[0.81\,\overset{\text{o}}{\mathop{\text{A}}}\,\] done
clear
D)
Radius of Na atoms is \[0.99\,\overset{\text{o}}{\mathop{\text{A}}}\,,\] while that of \[N{{a}^{+}}\] ion is \[1.54\,\overset{\text{o}}{\mathop{\text{A}}}\,\] done
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question_answer 9)
Covalent radius of nitrogen is 70 pm. Hence, covalent radius of boron is about:
A)
60 pm done
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B)
110 pm done
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C)
50 pm done
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D)
40 pm done
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question_answer 10)
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.
A)
I, II and IV done
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B)
III and IV only done
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C)
II, III and IV done
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D)
All are correct done
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question_answer 11)
I.E. of one H atom is \[2.18\times {{10}^{-18}}J\]. The I.E. of H atom is \[kJ\,\,mol{{e}^{-1}}\]is -
A)
\[1505\,kJ\,mo{{l}^{-1}}\] done
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B)
\[1310\,kJ\,mo{{l}^{-1}}\] done
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C)
\[1608\,kJ\,mo{{l}^{-1}}\] done
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D)
None done
clear
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question_answer 12)
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?
A)
V done
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B)
Cr done
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C)
Mn done
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D)
Fe done
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question_answer 13)
Electron addition will be easier in:
A)
O done
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B)
\[{{O}^{+}}\] done
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C)
\[{{O}^{2+}}\] done
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D)
\[{{O}^{2-}}\] done
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question_answer 14)
Sodium can't exhibit + 2 oxidation state because its second ionisation potential value is
A)
zero done
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B)
equal to first done
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C)
less than first done
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D)
much higher than the first done
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question_answer 15)
The correct order of electron affinities of N, O, S and Cl are
A)
\[O<N<Cl<S\] done
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B)
\[O<S<Cl<N\] done
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C)
\[O=Cl<N=S\] done
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D)
\[N<O<S<Cl\] done
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question_answer 16)
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.
A)
1 done
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B)
2 done
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C)
4 done
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D)
3 done
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question_answer 17)
Ionic radii of
A)
\[T{{i}^{4+}}<M{{n}^{7+}}\] done
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B)
\[^{35}C{{l}^{-}}{{<}^{\,\,37}}C{{l}^{-}}\] done
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C)
\[{{K}^{+}}/C{{l}^{-}}\] done
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D)
\[{{P}^{3+}}>{{P}^{5+}}\] done
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question_answer 18)
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 -
A)
36 done
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B)
34 done
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C)
33 done
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D)
32 done
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question_answer 19)
Find the atomic number of element belonging to 4th period and 17th group in Modem periodic table:
A)
17 done
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B)
25 done
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C)
59 done
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D)
35 done
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question_answer 20)
Which of the following statements is incorrect?
A)
In the long form of periodic table, the number of period indicates the value of principal quantum number. done
clear
B)
There are four d-block series comprising of total 40 elements in the long form of periodic table. done
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C)
s-block, d-block and f-block elements are metals. done
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D)
AII p-block elements are non-metal. done
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question_answer 21)
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)
78% done
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B)
31.25% done
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C)
50.25% done
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D)
None of these done
clear
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question_answer 22)
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
A)
\[6.72\,\overset{\text{o}}{\mathop{\text{A}}}\,\] done
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B)
\[5.82\,\overset{\text{o}}{\mathop{\text{A}}}\,\] done
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C)
\[6.9\,\overset{\text{o}}{\mathop{\text{A}}}\,\] done
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D)
\[7.5\,\overset{\text{o}}{\mathop{\text{A}}}\,\] done
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question_answer 23)
The correct order of the metallic character is:
A)
\[Na>Mg>Al>Si\] done
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B)
\[Mg>Na>Al>Si\] done
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C)
\[Al>Mg>Na>Si\] done
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D)
\[Si>Al>Na>Mg\] done
clear
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question_answer 24)
Pd has exceptional valence shell electronic configuration of \[4{{d}^{10}}5{{s}^{0}}\]. It is a member of-
A)
5th Period, Group 10 done
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B)
4th Period, Group 12 done
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C)
6th Period, Group 10 done
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D)
5th Period, Group 14 done
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question_answer 25)
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
A)
Na done
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B)
Si done
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C)
F done
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D)
Ca done
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question_answer 26)
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 -
List I List II [A] 52 [p] s-block [B] 56 [q] p-block [C] 57 [r] d-block [D] 60 [s] f-block
A)
[A]\[\to \]q, [B]\[\to \]p, [C] \[\to \]r, [D]\[\to \]s done
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B)
[A]\[\to \]q, [B]\[\to \]p, [C]\[\to \]s, [D]\[\to \]r done
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C)
[A]\[\to \]p, [B]\[\to \]q, [C]\[\to \]r, [D]\[\to \]s done
clear
D)
[A]\[\to \]p, [B]\[\to \]b, [C]\[\to \]s, [D]\[\to \]r done
clear
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question_answer 27)
The statement that is not correct for periodic classification of elements is
A)
the properties of elements are periodic functions of their atomic numbers done
clear
B)
non - metallic elements are less in number than metallic elements done
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C)
for transition elements, the 3d-orbitals are filled with electrons after 3p-orbitals and before 4s-orbitals. done
clear
D)
the first ionisation enthalpies of elements generally increase with increase in atomic number as we go along a period. done
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question_answer 28)
What should be the atomic number of the next halogen if discovered in future?
A)
115 done
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B)
119 done
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C)
117 done
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D)
121 done
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question_answer 29)
The law of triads is applicable to -
A)
C, N, O done
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B)
H, O, N done
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C)
Na, K, Rb done
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D)
Cl, Br, I done
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question_answer 30)
Match the correct ionisation enthalpies and electron gain enthalpies of the following elements.
Elements \[\Delta {{H}_{1}}\] \[\Delta {{H}_{2}}\] \[\Delta {{e}_{g}}H\] (A) Most reactive non - metal (i) 419 3051 - 45 (B) Most reactive metal (ii) 1681 3374 - 328 (C) Least reactive element (iii) 738 1451 - 40 (D) Metal forming binary halide (iv) 2372 5251 +48
A)
[A]\[\to \](ii), [B]\[\to \](i), [C]\[\to \](iv), [D]\[\to \](iii) done
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B)
[A]\[\to \](i), [B]\[\to \](ii), [C]\[\to \](iv), [D]\[\to \](iii) done
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C)
[A]\[\to \](i), [B]\[\to \](iv), [C]\[\to \](iii), [D]\[\to \](iv) done
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D)
[A]\[\to \](ii), [B]\[\to \](i), [C]\[\to \](iii), [D]\[\to \](iv) done
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question_answer 31)
Match List-I with List-II and select the correct answer using the code given below the lists:
List - I List - II \[C{{O}_{3}}^{2-}\] (p) Semi-metals \[B,Si,Ge,\]\[As,Sb\] (q) Isoelectronic species \[Kr,Xe\] (r) Van der waal's radii M(g) + energy\[\to {{M}^{+}}(g)+{{e}^{-}}\] (s) lonisation energy
Code:
A)
[A]\[\to \]q, [B]\[\to \]p, [C]\[\to \]r, [D]\[\to \]s done
clear
B)
[A]\[\to \]p, [B]\[\to \]q, [C]\[\to \]r, [D]\[\to \]s done
clear
C)
[A]\[\to \]q, [B]\[\to \]p, [C]\[\to \]s, [D]\[\to \]r done
clear
D)
[A]\[\to \]r, [B]\[\to \]p, [C]\[\to \]q, [D]\[\to \]s done
clear
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question_answer 32)
Which element do you think would have been named by Lawrence Berkeley laboratory?
A)
Berkelium done
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B)
Lawrencium done
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C)
Both [a] and [b] done
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D)
Seaborgium done
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question_answer 33)
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.
A)
Atomic number done
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B)
Azimuthal quantum number done
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C)
Principal quantum number done
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D)
Atomic mass done
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question_answer 34)
How many elements would be in the second period of the Periodic Table if the spin quantum number \[{{m}_{s}}\] could have the value \[-\frac{1}{2},\,0,\,+\frac{1}{2}\]?
A)
8 done
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B)
10 done
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C)
12 done
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D)
18 done
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question_answer 35)
Which of the following order is CORRECT for the property mentioned in brackets:
A)
B)
C)
D)
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