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![Selina solutions for Concise Chemistry [English] Class 8 ICSE chapter 4 - Atomic Structure - Shaalaa.com](/images/concise-chemistry-english-class-8-icse_6:3eba9a383eb74e06b4937fa0eadb7842.jpg "Selina solutions for Concise Chemistry [English] Class 8 ICSE chapter 4 - Atomic Structure")
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Solutions for Chapter 4: Atomic Structure
Below listed, you can find solutions for Chapter 4 of CISCE Selina for Concise Chemistry [English] Class 8 ICSE.
Selina solutions for Concise Chemistry [English] Class 8 ICSE 4 Atomic Structure Exercise [Pages 51 - 52]
Dalton said that ______ could not be divided.
Fill in the blank
An ion which has a positive charge is called a ..................
Fill in the blank
The outermost shell of an atom is known as............................
Fill in the blank
The ..........................of an atom is very hard and dense.
Fill in the blank
Neutrons are .......................... particles having mass equal to that of protons.
Fill in the blanks.
Isotopes are the atoms of ______ element having the ______ atomic number but ______ mass number.
Write true or false for the following statement
An atom on the whole has a positive charge.
True
False
Write true or false for the following statement
The maximum number of electrons in the first shell can be 8.
True
False
Write true or false for the following statement
The central pad of the atom is called nucleus.
True
False
Give the following a suitable word/phrase
The sub-atomic particle with negative charge and negligible mass.
Give the following a suitable word/phrase.
Protons and neutrons present in the nucleus.
Give the following a suitable word/phrase.
The electrons present in the outermost shell.
Give the following a suitable word/phrase
Arrangement of electrons in the shells of an atom.
Give the following a suitable word/phrase.
The number of protons present in the nucleus of an atom.
Give the following a suitable word/phrase.
The sum of the number of protons and neutrons of an atom.
Give the following a suitable word/phrase.
Atoms of same element with same atomic number but a different mass number.
Give the following a suitable word/phrase.
The smallest unit of an element which takes part in a chemical reaction.
Multiple Choice Questions
The outermost shell of an atom is known as
valency
valence electrons
nucleus
valence shell
Multiple Choice Questions
number of valence electrons present in magnesium is
two
three
four
five
Multiple Choice Questions
The sub atomic particle with negative charge is
proton
neutron
electron
nucleon
Multiple Choice Questions
If the atomic number of an atom is 17 and mass number is 35 then number of neutron will be
35
17
18
52
Multiple Choice Questions
The number of electrons in an atom is equal to number of
protons in a neutral atom
neutrons in a neutral atom
nucleons in a neutral atom
none of the above
Multiple Choice Questions
The sum of number of protons and number of neutrons present in the nucleus of an atom is called its
mass number
atomic number
number of electrons
all of the above
Name three fundamental particles of the atom. Give the symbol with charge, on each particle.
Define the term Atomic number.
Define the term Mass number.
Define the term Nucleons.
Define the term Valence shell.
Mention briefly the salient features of Dalton’s atomic theory (five points)
What are the two main features of Rutherford’s atomic model?
State its one drawback of Rutherford’s atomic model.
What are the observations of the experiment done by Rutherford in order to determine the structure of an atom?
State the mass number, the atomic number, number of neutrons and electronic configuration of the following atoms.
`""^12""_6C, ""^16""_8O, ""^19""_9F, ""^20""_10Ne, ""_13""Al""^27, ""_17""Cl""^35`
Also, draw atomic diagrams for them.
What is variable valency? Name two elements having variable valency and state their valencies.
The atomic number and the mass number of sodium are 11 and 23 respectively. What information is conveyed by this statement.
Draw the diagrams representing the atomic structures of the following: Nitrogen.
Draw the diagrams representing the atomic structures of the following: Neon
Explain the rule with example according to which electrons are filled in various energy levels
The atom of an element is made up of 4 protons, 5 neutrons and 4 electrons. What is its atomic number and mass number?
What are the two main parts of which an atom is made of?
Where is the nucleus of an atom situated?
What are orbits or shells of an atom?
What are isotopes?
How does the existence of isotopes contradict Dalton’s atomic theory?
Complete the table below by identifying A, B, C, D, E and F.
Solutions for 4: Atomic Structure
Selina solutions for Concise Chemistry [English] Class 8 ICSE chapter 4 - Atomic Structure
Shaalaa.com has the CISCE Mathematics Concise Chemistry [English] Class 8 ICSE CISCE solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. Selina solutions for Mathematics Concise Chemistry [English] Class 8 ICSE CISCE 4 (Atomic Structure) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
Further, we at Shaalaa.com provide such solutions so students can prepare for written exams. Selina textbook solutions can be a core help for self-study and provide excellent self-help guidance for students.
Concepts covered in Concise Chemistry [English] Class 8 ICSE chapter 4 Atomic Structure are Atoms: Building Blocks of Matter, Nucleus, Neutrons (n), J. J. Thomson’s Atomic Model, Lord Rutherford’s Atomic model, Structure of an Atom, Atomic Number (Z), Mass Number (A), and Number of Neutrons (n), History of Atom, Atomic Mass, Discovery of Charged Particles in Matter, Electronic Configuration of Atom, Electrons (e), Electronic Configuration of Atom, Protons (p), Isotopes, Dalton’s Atomic Theory, Valency, Ions (Radicals) and Its Types, Neils Bohr’s Model of an Atom, Variable Valency.
Using Selina Concise Chemistry [English] Class 8 ICSE solutions Atomic Structure exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in Selina Solutions are essential questions that can be asked in the final exam. Maximum CISCE Concise Chemistry [English] Class 8 ICSE students prefer Selina Textbook Solutions to score more in exams.
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