Chemistry Chapter 5 – Atomic Structure (Class 11) for FSC, Entry Tests & NTS Preparation
Chapter 5, Atomic Structure, is a fundamental topic for Class 11 students preparing for FSC board exams and medical/engineering entry tests like MDCAT, NUMS, AKU, NUST, ECAT, and NTS exams. This chapter explains the structure of atoms, subatomic particles, and the principles that govern electron arrangement, which are essential for understanding chemical bonding and reactions.
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X-rays are defined as:
NUMS 2020
Chemistry
Atomic Structure
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Which quantum number decides energy of orbitals?
Which of the following statements is correct?
NTS 2011
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Diameter of an atom is in the range of?
NUMS 2014
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d subshell has
The radii of the second orbit of the hydrogen atom calculated from Bohr’s model is:
NTS 2013
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The spectrum of He is expected to be similar to that of:
NUMS 2014
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Shape of the orbital occupied by an electron is defined by:
NTS 2016 DUHS & JSMU
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A 4s orbital has:
NUMS 2014
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When B- particles are sent through a thin metal foil, most of them go straight through the foil as:
NTS 2017
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Electronic configuration of K is:
NUMS 2014
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J.J Thomson determined the:
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Maximum ____ electrons can be placed in one orbital:
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An element has configuration 2, 8, 1. It belongs to, ______.
NTS 2016 SMBBMC
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If an electron of hydrogen atom jumps from 5th orbit to 7’h orbit, its atomic radius increases
If an electron makes a transition from 4th orbit to inner orbits, then the wavelength for which the radius is maximum, lies in which of the following series?
If uncertainty in the position of an electron is zero the uncertainty in its Momentum is?
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Breaking of neutron produces?
The amount of energy released by absorbing an electron in the valence shell is:
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) The velocity of electron in outermost shell Is?
Which of the following has the maximum number of unpaired electrons?
NUMS 2015
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P.E of an electron in the orbit of an atom Is
The maximum number of electrons that an orbital can accommodate is/are:
NTS 2010
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The amount of energy associated with quantum of radiation is directly proportional to:
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Which of the following has lowest e/m ratio?
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The number of electrons present in n=2 , l = 1 and m = 1, 0, -1 are:
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The Neutron was discovered by:
NTS 2018
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If an electron jumps from fourth to first orbit, which of the following series will it show?
Choose the value of the Rydberg constant among the following values:
NUMS 2014
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In a discharge tube, at room pressure there is
What are the values of orbital quantum number/0 and magnetic quantum number(m) for subshell?
The atomic number Z of an atom represents the:
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Which of the following best describes the emission spectrum of atomic hydrogen?
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Which of the following is the electronic configuration of 19K?
NUMS 2016
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Spectrum of which series is in the UV region?
Diameter of Hydrogen atom is?
Which of the following does not show variable valency?
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Mass of electron in a.m.u is:
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The relationship between quantum number n and l is:
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Spectrum of which series is in the visible region?
The difference between soft and hard X-rays is of:
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Quantum number values for ‘2p’ orbitals are:
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Which one of the following is not an isotope of hydrogen:
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Which of the following fundamental particles have the same mass/kg?
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Which orbitals always possess same energy:
The quantum numbers +½ and -½ for the electron spin represent:
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The ground state of an atom corresponds to a state of :
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The radius of the third Bohr orbit is:
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The charge on one proton is:
NUMS 2019 Reconduct
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Which of the following orbital will be filled first than 4p?
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Which pair has 1 electron in it’s ‘s’ orbital?
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“In an atom no two electrons can have the some set of four Quantum numbers” is stated by:
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Many elements have fractional atomic masses. This is because:
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The maximum possible number of electrons a shell ‘n’ can accommodate is given by:
NTS 2012
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If an election jumps from 6th orbit to 2nd orbit then decrease in radius will be?
The Balmer series lies in which region of the electromagnetic spectrum?
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The correct order of orbitals is:
Bracket series of 14-atom is in which of the following regions of electromagnetic spectrum?
Which of the following does not have an inert gas configuration?
NUMS 2015
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How many electrons can have the values n=2, l=1, and s=+½ in the configuration 1s2, 2s2, 2p3?
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Which is the configuration of Cr?
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For a multi-electron atom, the highest energy level among the following is:
NTS 2013
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Number of transitions possible for an electron in the 6th shell are
Nitrogen and phosphorus have 3 of their valence electrons unpaired because of:
NTS 2014
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When alpha particles are bombarded on beryllium
The lightest positive rays obtained is from:
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The maximum number of electrons in an atom with n=3 and l=2 is:
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Electronic configuration of M2+ ion is 2, 8, 14 and its atomic weight is 56 amu. The number of neutrons in its nucleus are:
NTS 2017
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Which of the following quantum numbers are for p-subshell?
The electronic configuration of iron is:
NTS 2011
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Key Concepts about Atomic Structure
The chapter explains the structure of the atom, including protons, neutrons, and electrons. It covers various atomic models, such as Dalton’s, Thomson’s, Rutherford’s, and Bohr’s models, and their limitations. The chapter also discusses quantum numbers, electronic configuration, and the principles governing the distribution of electrons in orbitals. Each concept is illustrated with diagrams, examples, and step-by-step problem-solving methods. These concepts are highly important for FSC board exams and entry tests like MDCAT, NUMS, AKU, NUST, and ECAT.
Free Entry Test Preparation
Mastery of atomic structure helps students understand chemical properties, solve numerical problems, and apply concepts to bonding, periodicity, and molecular structure. PLS Academy provides practice questions, solved past papers, and chapter-wise MCQs to help students revise these topics effectively. Regular study of this chapter improves problem-solving skills, conceptual clarity, and exam performance, ensuring students are well-prepared for FSC board exams, competitive entry tests, and NTS exams.
JazakAllah.
