11242 + Mcqs in Chemistry Page 28 McqOptions

1351.	Choose the element which is not radioactive [CPMT 1988]
A.	\[Cm\]
B.	\[No\]
C.	\[Mo\]
D.	\[Md\]
Answer» D. \[Md\]

Discussion

1352.	X-rays are produced due to [JIPMER 2002]
A.	Bombarding of electrons on solids
B.	Bombarding of a-particle on solids
C.	Bombarding of g-rays on solids
D.	Bombarding of neutron on solids
Answer» B. Bombarding of a-particle on solids

Discussion

1353.	b-particle is emitted in radioactivity by [AIEEE 2002; MP PMT 2004]
A.	Conversion of proton to neutron
B.	Form outermost orbit
C.	Conversion of neutron to proton
D.	b-particle is not emitted
Answer» D. b-particle is not emitted

Discussion

1354.	\[\alpha \]-rays have [CPMT 1973, 78; NCERT 1977]
A.	Positive charge
B.	Negative charge
C.	No charge
D.	Sometimes positive charge and sometimes negative charge
Answer» B. Negative charge

Discussion

1355.	Penetrating power of a-particle is [MP PMT 2002]
A.	More than g-rays
B.	More than b-rays
C.	Less than b-rays
D.	None of these
Answer» D. None of these

Discussion

1356.	Which of the following is radioactive element [CPMT 1988]
A.	Sulphur
B.	Polonium
C.	Tellurium
D.	Selenium
Answer» C. Tellurium

Discussion

1357.	The \[\alpha \]-particle is identical with [CPMT 1972, 82, 86; BHU 1984; MP PMT 1990, 91, 93; MP PET 1999]
A.	Helium nucleus
B.	Hydrogen nucleus
C.	Electron
D.	Proton
Answer» B. Hydrogen nucleus

Discussion

1358.	If by mistake some radioactive substance gets inside the human body, then from the point of view of radiation damage, the most harmful will be the one which emits [DPMT 1986]
A.	\[\gamma \]-rays
B.	Neutrons
C.	\[\beta \]-particles
D.	\[\alpha \]-particles
Answer» B. Neutrons

Discussion

1359.	Which is the correct statement [CPMT 1971]
A.	Isotopes are always radioactive
B.	\[\beta \]-rays are always negatively charged particles
C.	\[\alpha \]-rays are always negatively charged particles
D.	\[\gamma \]-rays can be deflected in magnetic field
Answer» C. \[\alpha \]-rays are always negatively charged particles

Discussion

1360.	Which of the following does not contain material particles [BHU 2002]
A.	Alpha rays
B.	Beta rays
C.	Gamma rays
D.	Canal rays
Answer» D. Canal rays

Discussion

1361.	Correct configuration of \[F{{e}^{+3}}\] [26] is [CPMT 1994; BHU 1995; KCET 1992]
A.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{5}}\]
B.	\[1{{s}^{2}},2{{s}^{2}}s{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{3}},4{{s}^{2}}\]
C.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{6}},4{{s}^{2}}\]
D.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{5}},4{{s}^{1}}\]
Answer» B. \[1{{s}^{2}},2{{s}^{2}}s{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{3}},4{{s}^{2}}\]

Discussion

1362.	The set of quantum numbers not applicable for an electron in an atom is [MNR 1994]
A.	\[n=1,\,l=1,\,{{m}_{l}}=1,\,{{m}_{s}}=+1/2\]
B.	\[n=1,\,l=0,\,{{m}_{l}}=0,\,{{m}_{s}}=+1/2\]
C.	\[n=1,\,l=0,\,{{m}_{l}}=0,\,{{m}_{s}}=-1/2\]
D.	\[n=2,\,l=0,\,{{m}_{l}}=0,\,{{m}_{s}}=+1/2\]
Answer» B. \[n=1,\,l=0,\,{{m}_{l}}=0,\,{{m}_{s}}=+1/2\]

Discussion

1363.	Which of the following statements is not correct for an electron that has the quantum numbers \[n=4\] and \[m=2\] [MNR 1993]
A.	The electron may have the quantum number \[s=+\frac{1}{2}\]
B.	The electron may have the quantum number \[l=2\]
C.	The electron may have the quantum number \[l=3\]
D.	The electron may have the quantum number \[l=0,\,1,\,2,\,3\]
Answer» E.

Discussion

1364.	Which of the following represents the correct sets of the four quantum numbers of a \[4d\] electron [MNR 1992; UPSEAT 2001; J&K CET 2005]
A.	\[4,\,3,\,2,\,\frac{1}{2}\]
B.	4, 2, 1, 0
C.	\[4,\,3,\,-2,\,+\frac{1}{2}\]
D.	\[4,\,2,\,1,\,-\frac{1}{2}\]
Answer» E.

Discussion

1365.	The order of filling of electrons in the orbitals of an atom will be [CBSE PMT 1991]
A.	\[3d,\,4s,\,4p,\,4d,\,5s\]
B.	\[4s,\,3d,\,4p,\,5s,\,4d\]
C.	\[5s,\,4p,\,3d,\,4d,\,5s\]
D.	\[3d,\,4p,\,4s,\,4d,\,5s\]
Answer» C. \[5s,\,4p,\,3d,\,4d,\,5s\]

Discussion

1366.	For azimuthal quantum number \[l=3\], the maximum number of electrons will be [CBSE PMT 1991; EAMCET 1991; RPMT 2002; CBSE PMT 2002]
A.	2
B.	6
C.	0
D.	14
Answer» E.

Discussion

1367.	An ion has 18 electrons in the outermost shell, it is [CBSE PMT 1990]
A.	\[C{{u}^{+}}\]
B.	\[T{{h}^{4+}}\]
C.	\[C{{s}^{+}}\]
D.	\[{{K}^{+}}\]
Answer» B. \[T{{h}^{4+}}\]

Discussion

1368.	How many electrons can be accommodated in a sub-shell for which \[n=3,\,l=1\] [CBSE PMT 1990]
A.	8
B.	6
C.	18
D.	32
Answer» C. 18

Discussion

1369.	Correct set of four quantum numbers for valence electron of rubidium (Z = 37) is [IIT 1984; JIPMER 1999; UPSEAT 2003]
A.	\[5,\,0,\,0,\,+\frac{1}{2}\]
B.	\[5,\,1,\,0,\,+\frac{1}{2}\]
C.	\[5,\,1,\,1,\,+\frac{1}{2}\]
D.	\[6,\,0,\,0,\,+\,\frac{1}{2}\]
Answer» B. \[5,\,1,\,0,\,+\frac{1}{2}\]

Discussion

1370.	When the azimuthal quantum number has a value of \[l=1\], the shape of the orbital is [MP PET 1993]
A.	Unsymmetrical
B.	Spherically symmetrical
C.	Dumb-bell
D.	Complicated
Answer» D. Complicated

Discussion

1371.	The principal quantum number represents [CPMT 1991]
A.	Shape of an orbital
B.	Distance of electron from nucleus
C.	Number of electrons in an orbit
D.	Number of orbitals in an orbit
Answer» C. Number of electrons in an orbit

Discussion

1372.	The electronic configuration (outermost) of \[M{{n}^{+2}}\] ion (atomic number of \[Mn=25\]) in its ground state is [MP PET 1993]
A.	\[3{{d}^{5}},4{{s}^{0}}\]
B.	\[3{{d}^{4}},4{{s}^{1}}\]
C.	\[3{{d}^{3}},4{{s}^{2}}\]
D.	\[3{{d}^{2}},4{{s}^{2}}4{{p}^{2}}\]
Answer» B. \[3{{d}^{4}},4{{s}^{1}}\]

Discussion

1373.	The shape of \[p\]-orbital is [MP PMT 1993]
A.	Elliptical
B.	Spherical
C.	Dumb-bell
D.	Complex geometrical
Answer» D. Complex geometrical

Discussion

1374.	There is no difference between a \[2p\] and a \[3p\]orbital regarding [BHU 1981]
A.	Shape
B.	Size
C.	Energy
D.	Value of \[n\]
Answer» B. Size

Discussion

1375.	The electronic configuration of chromium is [MP PMT 1993; MP PET 1995; BHU 2001; BCECE 2005]
A.	\[[Ne]3{{s}^{2}}3{{p}^{6}}3{{d}^{4}},4{{s}^{2}}\]
B.	\[[Ne]3{{s}^{2}}3{{p}^{6}}3{{d}^{5}},4{{s}^{1}}\]
C.	\[[Ne]3{{s}^{2}}3{{p}^{6}},4{{s}^{2}}4{{p}^{4}}\]
D.	\[[Ne]3{{s}^{2}}3{{p}^{6}}3{{d}^{1}},4{{s}^{2}}4{{p}^{3}}\]
Answer» C. \[[Ne]3{{s}^{2}}3{{p}^{6}},4{{s}^{2}}4{{p}^{4}}\]

Discussion

1376.	The total number of electrons that can be accommodated in all the orbitals having principal quantum number 2 and azimuthal quantum number 1 is [CPMT 1971, 89, 91]
A.	2
B.	4
C.	6
D.	8
Answer» D. 8

Discussion

1377.	Electronic configuration of \[C\] is [CPMT 1975]
A.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{2}}\]
B.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{3}}\]
C.	\[1{{s}^{2}},2{{s}^{2}}\]
D.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}}\]
Answer» B. \[1{{s}^{2}},2{{s}^{2}}2{{p}^{3}}\]

Discussion

1378.	If an electron has spin quantum number of \[+\frac{1}{2}\] and a magnetic quantum number of \[-1\], it cannot be presented in an [CBSE PMT 1989; UPSEAT 2001]
A.	\[d\]-orbital
B.	\[f\]-orbital
C.	\[p\]-orbital
D.	\[s\]-orbital
Answer» E.

Discussion

1379.	Principal, azimuthal and magnetic quantum numbers are respectively related to [CPMT 1988; AIIMS 1999]
A.	Size, shape and orientation
B.	Shape, size and orientation
C.	Size, orientation and shape
D.	None of the above
Answer» B. Shape, size and orientation

Discussion

1380.	Krypton \[{{(}_{36}}Kr)\] has the electronic configuration \[{{(}_{18}}Ar)\] \[4{{s}^{2}},3{{d}^{10}},4{{p}^{6}}\]. The \[{{37}^{th}}\] electron will go into which one of the following sub-levels [CBSE PMT 1989; CPMT 1989; EAMCET 1991]
A.	\[4f\]
B.	\[4d\]
C.	\[3p\]
D.	\[5s\]
Answer» E.

Discussion

1381.	Which element is represented by the following electronic configuration [MP PMT 1987]
A.	Nitrogen
B.	Oxygen
C.	Fluorine
D.	Neon
Answer» D. Neon

Discussion

1382.	How many electrons can be fit into the orbitals that comprise the \[{{3}^{rd}}\] quantum shell \[n=3\] [MP PMT 1986, 87; Orissa JEE 1997]
A.	2
B.	8
C.	18
D.	32
Answer» D. 32

Discussion

1383.	Which one is the electronic configuration of \[F{{e}^{+2}}\] [MADT Bihar 1982; AIIMS 1989]
A.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{6}}\]
B.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{4}},4{{s}^{2}}\]
C.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{5}},4{{s}^{1}}\]
D.	None of these
Answer» B. \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{4}},4{{s}^{2}}\]

Discussion

1384.	\[C{{u}^{2+}}\] will have the following electronic configuration [MP PMT 1985]
A.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{10}}\]
B.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{9}},4{{s}^{1}}\]
C.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{9}}\]
D.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{10}},4{{s}^{1}}\]
Answer» D. \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{10}},4{{s}^{1}}\]

Discussion

1385.	In a potassium atom, electronic energy levels are in the following order [EAMCET 1979; DPMT 1991]
A.	\[4s>3d\]
B.	\[4s>4p\]
C.	\[4s<3d\]
D.	\[4s<3p\]
Answer» D. \[4s<3p\]

Discussion

1386.	\[Fe\] (atomic number = 26) atom has the electronic arrangement [NCERT 1974; MNR 1980]
A.	2, 8, 8, 8
B.	2, 8, 16
C.	2, 8,14, 2
D.	2, 8, 12, 4
Answer» D. 2, 8, 12, 4

Discussion

1387.	When \[3d\] orbital is complete, the new electron will enter the [EAMCET 1980; MP PMT 1995]
A.	\[4p\]-orbital
B.	\[4f\]-orbital
C.	\[4s\]-orbital
D.	\[4d\]-orbital
Answer» B. \[4f\]-orbital

Discussion

1388.	The shape of \[s\]-orbital is [NCERT 1978I]
A.	Pyramidal
B.	Spherical
C.	Tetrahedral
D.	Dumb-bell shaped
Answer» C. Tetrahedral

Discussion

1389.	Which of the following represents the electronic configuration of an element with atomic number 17 [AMU 1982]
A.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{1}}3{{p}^{6}}\]
B.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{4}},4{{s}^{1}}\]
C.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{5}}\]
D.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{1}}3{{p}^{4}},4{{s}^{2}}\]
Answer» D. \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{1}}3{{p}^{4}},4{{s}^{2}}\]

Discussion

1390.	In a multi-electron atom, which of the following orbitals described by the three quantum members will have the same energy in the absence of magnetic and electric fields [AIEEE 2005] (1) \[n=1,\,l=0,\,m=0\] (2) \[n=2,\,l=0,\,m=0\] (3) \[n=2,\,l=1,\,m=1\] (4) \[n=3,\,l=2,\,m=0\] (5) \[n=3,\,l=2,\,m=0\]
A.	(1) and (2)
B.	(2) and (3)
C.	(3) and (4)
D.	(4) and (5)
Answer» E.

Discussion

1391.	The electronic configuration of an element with atomic number 7 i.e. nitrogen atom is [CPMT 1982, 84, 87]
A.	\[1{{s}^{2}},2{{s}^{1}},2p_{x}^{3}\]
B.	\[1{{s}^{2}},2{{s}^{2}}2p_{x}^{2}2p_{y}^{1}\]
C.	\[1{{s}^{2}},2{{s}^{2}}2p_{x}^{1}2p_{y}^{1}2p_{z}^{1}\]
D.	\[1{{s}^{2}},2{{s}^{2}}2p_{x}^{1}2p_{y}^{2}\]
Answer» D. \[1{{s}^{2}},2{{s}^{2}}2p_{x}^{1}2p_{y}^{2}\]

Discussion

1392.	The magnetic quantum number for valency electrons of sodium is [CPMT 1988; MH CET 1999]
A.	3
B.	2
C.	1
D.	0
Answer» E.

Discussion

1393.	Elements upto atomic number 103 have been synthesized and studied. If a newly discovered element is found to have an atomic number 106, its electronic configuration will be [AIIMS 1980]
A.	\[[Rn]5{{f}^{14}},6{{d}^{4}},7{{s}^{2}}\]
B.	\[[Rn]5{{f}^{14}},6{{d}^{1}},7{{s}^{2}}7{{p}^{3}}\]
C.	\[[Rn]5{{f}^{14}},6{{d}^{6}},7{{s}^{0}}\]
D.	\[[Rn]5{{f}^{14}},6{{d}^{5}},7{{s}^{1}}\]
Answer» E.

Discussion

1394.	Which of the following ions is not having the configuration of neon
A.	\[{{F}^{-}}\]
B.	\[M{{g}^{+2}}\]
C.	\[N{{a}^{+}}\]
D.	\[C{{l}^{-}}\]
Answer» E.

Discussion

1395.	For \[n=3\] energy level, the number of possible orbitals (all kinds) are [BHU 1981; CPMT 1985; MP PMT 1995]
A.	1
B.	3
C.	4
D.	9
Answer» E.

Discussion

1396.	Which one of the following configuration represents a noble gas [CPMT 1983, 89, 93; NCERT 1973; MP PMT 1989; DPMT 1984]
A.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}\]
B.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{1}}\]
C.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}}\]
D.	\[1{{s}^{2}},2{{s}^{2}}s{{p}^{6}},3{{s}^{2}}3{{p}^{6}},4{{s}^{2}}\]
Answer» D. \[1{{s}^{2}},2{{s}^{2}}s{{p}^{6}},3{{s}^{2}}3{{p}^{6}},4{{s}^{2}}\]

Discussion

1397.	For \[d\]electrons, the azimuthal quantum number is [MNR 1983; CPMT 1984]
A.	0
B.	1
C.	2
D.	3
Answer» D. 3

Discussion

1398.	Pauli's exclusion principle states that [MNR 1983; AMU 1984]
A.	Two electrons in the same atom can have the same energy
B.	Two electrons in the same atom cannot have the same spin
C.	The electrons tend to occupy different orbitals as far as possible
D.	Electrons tend to occupy lower energy orbitals preferentially
E.	None of the above
Answer» F.

Discussion

1399.	The number of orbitals in \[d\] sub-shell is [MNR 1981]
A.	1
B.	3
C.	5
D.	7
Answer» D. 7

Discussion

1400.	The electronic configuration of copper \[{{(}_{29}}Cu)\] is [DPMT 1983; BHU 1980; AFMC 1981; CBSE PMT 1991; MP PMT 1995]
A.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{9}},4{{s}^{2}}\]
B.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{10}},4{{s}^{1}}\]
C.	\[1{{s}^{2}}.2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}},4{{s}^{2}}4{{p}^{6}}\]
D.	\[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{10}}\]
Answer» C. \[1{{s}^{2}}.2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}},4{{s}^{2}}4{{p}^{6}}\]

Discussion

Explore topic-wise MCQs in Joint Entrance Exam - Main (JEE Main).

Choose the element which is not radioactive [CPMT 1988]

X-rays are produced due to [JIPMER 2002]

b-particle is emitted in radioactivity by [AIEEE 2002; MP PMT 2004]

\[\alpha \]-rays have [CPMT 1973, 78; NCERT 1977]

Penetrating power of a-particle is [MP PMT 2002]

Which of the following is radioactive element [CPMT 1988]

The \[\alpha \]-particle is identical with [CPMT 1972, 82, 86; BHU 1984; MP PMT 1990, 91, 93; MP PET 1999]

If by mistake some radioactive substance gets inside the human body, then from the point of view of radiation damage, the most harmful will be the one which emits [DPMT 1986]

Which is the correct statement [CPMT 1971]

Which of the following does not contain material particles [BHU 2002]

Correct configuration of \[F{{e}^{+3}}\] [26] is [CPMT 1994; BHU 1995; KCET 1992]

The set of quantum numbers not applicable for an electron in an atom is [MNR 1994]

Which of the following statements is not correct for an electron that has the quantum numbers \[n=4\] and \[m=2\] [MNR 1993]

Which of the following represents the correct sets of the four quantum numbers of a \[4d\] electron [MNR 1992; UPSEAT 2001; J&K CET 2005]

The order of filling of electrons in the orbitals of an atom will be [CBSE PMT 1991]

For azimuthal quantum number \[l=3\], the maximum number of electrons will be [CBSE PMT 1991; EAMCET 1991; RPMT 2002; CBSE PMT 2002]

An ion has 18 electrons in the outermost shell, it is [CBSE PMT 1990]

How many electrons can be accommodated in a sub-shell for which \[n=3,\,l=1\] [CBSE PMT 1990]

Correct set of four quantum numbers for valence electron of rubidium (Z = 37) is [IIT 1984; JIPMER 1999; UPSEAT 2003]

When the azimuthal quantum number has a value of \[l=1\], the shape of the orbital is [MP PET 1993]

The principal quantum number represents [CPMT 1991]

The electronic configuration (outermost) of \[M{{n}^{+2}}\] ion (atomic number of \[Mn=25\]) in its ground state is [MP PET 1993]

The shape of \[p\]-orbital is [MP PMT 1993]

There is no difference between a \[2p\] and a \[3p\]orbital regarding [BHU 1981]

The electronic configuration of chromium is [MP PMT 1993; MP PET 1995; BHU 2001; BCECE 2005]

The total number of electrons that can be accommodated in all the orbitals having principal quantum number 2 and azimuthal quantum number 1 is [CPMT 1971, 89, 91]

Electronic configuration of \[C\] is [CPMT 1975]

If an electron has spin quantum number of \[+\frac{1}{2}\] and a magnetic quantum number of \[-1\], it cannot be presented in an [CBSE PMT 1989; UPSEAT 2001]

Principal, azimuthal and magnetic quantum numbers are respectively related to [CPMT 1988; AIIMS 1999]

Krypton \[{{(}_{36}}Kr)\] has the electronic configuration \[{{(}_{18}}Ar)\] \[4{{s}^{2}},3{{d}^{10}},4{{p}^{6}}\]. The \[{{37}^{th}}\] electron will go into which one of the following sub-levels [CBSE PMT 1989; CPMT 1989; EAMCET 1991]

Which element is represented by the following electronic configuration [MP PMT 1987]

How many electrons can be fit into the orbitals that comprise the \[{{3}^{rd}}\] quantum shell \[n=3\] [MP PMT 1986, 87; Orissa JEE 1997]

Which one is the electronic configuration of \[F{{e}^{+2}}\] [MADT Bihar 1982; AIIMS 1989]

\[C{{u}^{2+}}\] will have the following electronic configuration [MP PMT 1985]

In a potassium atom, electronic energy levels are in the following order [EAMCET 1979; DPMT 1991]

\[Fe\] (atomic number = 26) atom has the electronic arrangement [NCERT 1974; MNR 1980]

When \[3d\] orbital is complete, the new electron will enter the [EAMCET 1980; MP PMT 1995]

The shape of \[s\]-orbital is [NCERT 1978I]

Which of the following represents the electronic configuration of an element with atomic number 17 [AMU 1982]

The electronic configuration of an element with atomic number 7 i.e. nitrogen atom is [CPMT 1982, 84, 87]

The magnetic quantum number for valency electrons of sodium is [CPMT 1988; MH CET 1999]

Elements upto atomic number 103 have been synthesized and studied. If a newly discovered element is found to have an atomic number 106, its electronic configuration will be [AIIMS 1980]

Which of the following ions is not having the configuration of neon

For \[n=3\] energy level, the number of possible orbitals (all kinds) are [BHU 1981; CPMT 1985; MP PMT 1995]

Which one of the following configuration represents a noble gas [CPMT 1983, 89, 93; NCERT 1973; MP PMT 1989; DPMT 1984]

For \[d\]electrons, the azimuthal quantum number is [MNR 1983; CPMT 1984]

Pauli's exclusion principle states that [MNR 1983; AMU 1984]

The number of orbitals in \[d\] sub-shell is [MNR 1981]

The electronic configuration of copper \[{{(}_{29}}Cu)\] is [DPMT 1983; BHU 1980; AFMC 1981; CBSE PMT 1991; MP PMT 1995]