What was the basis of classification of elements before the knowledge of electronic structure of atom?

What was the basis of classification of elements before the knowledge of electronic structure of atom?
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What was the basis of classification of elements before the knowledge of electronic structure of atom?
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The elements of the third period of the Periodic Table are given below: periodic-classification-of-elements-chapter-wise-important-questions-class-10-science-1 (a) Which atom is bigger, Na or Mg? Why? (6) Identify the most (i) metallic and (ii) non-metallic element in Period 3. -Science

Description : The elements of the third period of the Periodic Table are given below: periodic-classification-of-elements-chapter-wise-important-questions-class-10-science-1 (a) Which atom is bigger, Na or Mg? Why? (6) Identify the most (i) metallic and (ii) non-metallic element in Period 3. -Science

Last Answer : (a) Sodium is bigger than magnesium as it has lesser nuclear charge so there is less force of attraction between nucleus and valence electrons and less effective nuclear charge. It is, therefore, ... the most non-metallic element because it can gain electrons easily due to its smallest atomic size.

What was the Mendeleev’s basis for classification of elements?

Description : What was the Mendeleev’s basis for classification of elements?

Last Answer : Mendeleev’s classification is based on atomic mass.

Give reason: Classification of elements on the basis of states of matter cannot be justified.

Description : Give reason: Classification of elements on the basis of states of matter cannot be justified.

Last Answer : Classification on the basis of states of matter cannot be justified because for example bromine and mercury are liquids at room temperature, they cannot be placed in the same group.

Classification of polymers on the basis of structure

Description : Classification of polymers on the basis of structure 

Last Answer : (a) Linear polymer :- These are polymers in which monomeric units are linked together to form linear chains. Eg. Polythene, PVC, Teflon  (b) Cross linked polymers:- These are polymers in which ... polymers in which monomers are joined to form long chains with side chains. Ex. Low density polythene.

In five kingdom system, the main basis of classification is (a) structure of nucleus (b) mode of nutrition (c) structure of cell wall (d) asexual reproduction.

Description : In five kingdom system, the main basis of classification is (a) structure of nucleus (b) mode of nutrition (c) structure of cell wall (d) asexual reproduction.

Last Answer : (b) mode of nutrition

Which of the following is not the classification of computers based on application? A) Electronic Computers B) Analog Computers C) Digital Computers D) Hybrid Computers

Description : Which of the following is not the classification of computers based on application? A) Electronic Computers B) Analog Computers C) Digital Computers D) Hybrid Computers

Last Answer : Answer : A

State the classification of electronic distance meter.

Description : State the classification of electronic distance meter. 

Last Answer : Classification of electronic distance meter A) Classification based on the type of carrier wave used Instrument using visible light waves Instrument using invisible infra-red waves ... or transmitted wave. Reflecting type such as geodimeters Transmitting types such as tellurometer

Explain the classification of resources on the basis of exhaustibility. -SST 10th

Description : Explain the classification of resources on the basis of exhaustibility. -SST 10th

Last Answer : (i) Renewable resources: Renewable resources are the natural resources which can be used again and again or can be reproduced by physical, mechanical and chemical processes. Solar energy, air, ... considered to be non-renewable resources because once they are used up, they are gone forever.

Explain the classification of resources on the basis of ownership. -SST 10th

Description : Explain the classification of resources on the basis of ownership. -SST 10th

Last Answer : (a) Individual Resources: Resources which are owned by private individuals are known as individual resources. Plots, fields, houses, cars, books, etc., are some examples of individual resources. (b) ... from the bed of the Indian Ocean from that area which lies beyond the Exclusive Economic Zone.

Explain the classification of resources on the basis of the state of development. -SST 10th

Description : Explain the classification of resources on the basis of the state of development. -SST 10th

Last Answer : Resources are classified on the basis of status of development in the following categories: i) Potential Resources - These are resources that have been found in a region but not yet been fully utilised. ... . However, their use has not yet been started. They can be used to meet future requirements.

Provide a suitable classification for resources on the basis of ownership. -SST 10th

Description : Provide a suitable classification for resources on the basis of ownership. -SST 10th

Last Answer : (i) Classification for resources on the basis of ownership: (a) Individual resources (b) Community owned resources (c) National resources (d) International resources (i) ... to open ocean and no individual country can utilise these without the concurrence of international institutions.

What is the basis of classification ?

Description : What is the basis of classification ?

Last Answer : Classification is usually based on the characteristics on which the classification is based .

The mian basis of Classification of Protozoa is

Description : The mian basis of Classification of Protozoa is

Last Answer : The mian basis of Classification of Protozoa is A. Size B. Shape C. locomotory device D. Numbe of nuclei.

The basis of the classification of protozoa is

Description : The basis of the classification of protozoa is

Last Answer : The basis of the classification of protozoa is A. Mode of nutrition B. Mode of reproduction C. Mode of locomotion D. Mode of respiration

What is the basis of classification of kingdom Plantae?

Description : What is the basis of classification of kingdom Plantae?

Last Answer : What is the basis of classification of kingdom Plantae?

Define the term classification. What is the basis of classification?

Description : Define the term classification. What is the basis of classification?

Last Answer : Define the term classification. What is the basis of classification?

What is the basis of classification of governments as unitary and federal? (1) Relationship between legislature and executive (2) Relationship between executive and judiciary (3) Relationship between the Centre and States (4) Relationship between the legislature, executive and judicial wings of government

Description : What is the basis of classification of governments as unitary and federal? (1) Relationship between legislature and executive (2) Relationship between executive and judiciary (3) Relationship ... Centre and States (4) Relationship between the legislature, executive and judicial wings of government

Last Answer : (3) Relationship between the Centre and States Explanation: The basic principles of federalism are the distribution of powers between the Centre and the States.

Which of the following is the classification of Industries on the basis of raw-materials? (1) Small Scale — Large scale (2) Primary and Secondary (3) Basic and Consumer (4) Agro-based and Mineral based

Description : Which of the following is the classification of Industries on the basis of raw-materials? (1) Small Scale — Large scale (2) Primary and Secondary (3) Basic and Consumer (4) Agro-based and Mineral based

Last Answer : (4) Agro-based and Mineral based Explanation: Industries are classified on the bases of source of raw material. There are two types of industries agro based and mineral based industries ... based industries are iron and steel, cement, aluminum, machine tools, and petrochemicals producing industries

Classification of polymers on the basis of mode of synthesis.

Description : Classification of polymers on the basis of mode of synthesis.

Last Answer : (a) Addition polymers:- A polymers formed by direct addition of repeated monomers without the elimination of by product molecule is called addition polymers. Ex. Polythene, PVC,PTFE, etc  (b) ... monomer generally contains two functional groups. Ex. Nylon 66 and Nylon 6, Bakelite, Daecron, etc.

Classification of polymers on the basis of molecular forces.

Description : Classification of polymers on the basis of molecular forces.

Last Answer : (a) Elastomers:- The polymers that have elastic character like rubber are called elastomers. Ex. Natural rubber  (b) Fibers:- They have strong intermolecular forces between the chains. These forces ... permanent change on heating. They become hard and infusible on heating. Ex. Bakelite. Etc.

What is the basis of classification of amino acids into ketogenic and glucogenic?

Description : What is the basis of classification of amino acids into ketogenic and glucogenic?

Last Answer : Ketogenic amino acids enter into the metabolic pathway of fats, while glucogenic amino acids enter the pathway of glucose metabolism.

__________ of the coal is the basis for Seylor's coal classification. (A) Proximate analysis (B) Ultimate analysis (C) Caking index (D) Calorific value

Description : __________ of the coal is the basis for Seylor's coal classification. (A) Proximate analysis (B) Ultimate analysis (C) Caking index (D) Calorific value

Last Answer : (B) Ultimate analysis

Biosystematics aims at (a) the classification of organisms based on broad morphological characters (b) delimiting various taxa of organisms and establishing their relationships (c) the classification of organisms based on their evolutionary history and establishing their phylogeny on the totality of various parameters from all fields of studies (d) identification and arrangement of organisms on the basis of their cytological characteristics.

Description : Biosystematics aims at (a) the classification of organisms based on broad morphological characters (b) delimiting various taxa of organisms and establishing their relationships (c) the ... (d) identification and arrangement of organisms on the basis of their cytological characteristics.

Last Answer : (b) delimiting various taxa of organisms and establishing their relationships

Which of the following is not a system under which classification of Agro-forestry System is done? a. Ecological Basis b. Socio-economic Basis c. Functional Basisd. Monetary Basis

Description : Which of the following is not a system under which classification of Agro-forestry System is done? a. Ecological Basis b. Socio-economic Basis c. Functional Basis d. Monetary Basis

Last Answer : d. Monetary Basis

Which of the following is not a system under which classification of Agro-forestry System is done? a. Ecological Basis b. Socio-economic c. Functional Basis d. Monetary Basis Basis

Description : Which of the following is not a system under which classification of Agro-forestry System is done? a. Ecological Basis b. Socio-economic Basis c. Functional Basis d. Monetary Basis

Last Answer : d. Monetary Basis

Give classification of alloy steel on the basis of its Constitution.

Description : Give classification of alloy steel on the basis of its Constitution.

Last Answer : Classification of alloy steels Based on its composition: 1) Simple alloy steels: It is the alloy steel containing one alloying element eg nickel steel 2) Quaternary alloy steel: It is the ... It is the alloy steel containing more than two alloying elements eg. High speed tool steel

Universal or Particular is the classification of the propositions on the basis of _______. A) Quantity B) Quality C) Validity D) Truth.

Description : Universal or Particular is the classification of the propositions on the basis of _______. A) Quantity B) Quality C) Validity D) Truth. 

Last Answer : A) Quantity 

Affirmative or Negative is the classification of propositions on the basis of _________. A) Quantity B) Quality C) Validity D) Truth.

Description : Affirmative or Negative is the classification of propositions on the basis of _________. A) Quantity B) Quality C) Validity D) Truth. 

Last Answer : B) Quality 

The basis of the following classification is ‘animal’ , ‘man’ , ‘house’ , ‘book’ , and ‘student’: (A) Definite descriptions (B) Proper names (C) Descriptive phrases (D) Common names

Description : The basis of the following classification is ‘animal’ , ‘man’ , ‘house’ , ‘book’ , and ‘student’: (A) Definite descriptions (B) Proper names (C) Descriptive phrases (D) Common names

Last Answer : (D) Common names

Which of the following is the classification of Industries on the basis of raw-materials ? (1) Small Scale – Large scale (2) Primary and Secondary (3) Basic and Consumer (4) Agro-based and Mineral based

Description : Which of the following is the classification of Industries on the basis of raw-materials ? (1) Small Scale – Large scale (2) Primary and Secondary (3) Basic and Consumer (4) Agro-based and Mineral based

Last Answer : Agro-based and Mineral based

Enlist the Classification of Irrigation on the basis of purposes.

Description : Enlist the Classification of Irrigation on the basis of purposes.

Last Answer : A. Single Purpose Irrigation Project: A project planned for one or single purpose is called as single purpose project e.g. Koyana project for hydropower, Gangapur project for irrigation etc.  B. ... b) Lift irrigation:  B. Sub-surface Irrigation: a) Natural Irrigation b) Artificial Irrigation

List classification of network on basis of geographical area. State the benefits of networks.

Description : List classification of network on basis of geographical area. State the benefits of networks.

Last Answer : Computer Networks are classified based on the geographical area into * Local Area Network * Metropolitan Area Network * Wide Area Network * Campus Area Network (CAN) * Personal Area ... hence the cost of installation, maintenance reduces and also makes it easier to manage these applications.

Classification of I.C. engines on the basis of

Description : Classification of I.C. engines on the basis of

Last Answer : 1) Method of ignition – Spark ignition engine, Compression ignition engine 2) Thermodynamic cycle – Otto cycle engine, diesel cycle engine, Dual cycle engine 

Give classification of insulating materials on the basis of state of material and give one application of each.

Description : Give classification of insulating materials on the basis of state of material and give one application of each.

Last Answer : Classification of Insulating material State of material   Application Solid insulating materials Wood, rubber, plastic, PVC, glass, porcelain, mica, Polypropylene film etc.   ... Switchgears, gas pressures cables, circuit breakers, generator cooling systems and X-ray apparatus

When a nucleus in an atom undergoes a radioactive decay, the electronic energy levels of the atom.

Description : When a nucleus in an atom undergoes a radioactive decay, the electronic energy levels of the atom.

Last Answer : When a nucleus in an atom undergoes a radioactive decay, the electronic energy levels of the ... decay processes D. Change for type of radioactivity.

Calculate the energy of hydrogen atom in the ground state given that the after Bohr orbit og hydrogen is `5xx10^(-11)m` and electronic charge is `1.6x

Description : Calculate the energy of hydrogen atom in the ground state given that the after Bohr orbit og hydrogen is `5xx10^(-11)m` and electronic charge is `1.6x

Last Answer : Calculate the energy of hydrogen atom in the ground state given that the after Bohr orbit og hydrogen is ` ... electronic charge is `1.6xx10^(-19) C`.

The electronic configuration of an atom having atomic number `20' is – (1) 2, 8, 10 (2) 2, 6, 8, 4 (3) 2, 8, 8, 2 (4) 2, 10, 8

Description : The electronic configuration of an atom having atomic number `20' is – (1) 2, 8, 10 (2) 2, 6, 8, 4 (3) 2, 8, 8, 2 (4) 2, 10, 8

Last Answer : (3) 2, 8, 8, 2 Explanation: Electrons occupy shells around the outside of an atom. There can be up to two electrons in the first shell, up to eight in the second and up to eight in the third. A calcium atom (Ca) has electron structure 2,8,8,2.

Write the excited state electronic configuration of carbon atom.

Description : Write the excited state electronic configuration of carbon atom.

Last Answer : 1s , 2s 2px 2py 2pz

Write the electronic configuration of carbon atom when it is in ground state.

Description : Write the electronic configuration of carbon atom when it is in ground state.

Last Answer : The electronic configuration of carbon atom in ground state is 1s 2 , 2s 2 , 2p 2

How is the electronic configuration of an atom related to the period in the periodic table?

Description : How is the electronic configuration of an atom related to the period in the periodic table?

Last Answer : Periods are formed according to the way in which electrons get filled up in different shells and orbitals. For example first period of the table is completed when the first shell of the atom is completely filled up

How does the electronic configuration of an atom relate to its position in the modern periodic table?

Description : How does the electronic configuration of an atom relate to its position in the modern periodic table?

Last Answer : The group number of elements having up to two valence electrons is equal to the number of valence electrons. For example: Group 1 elements have 1 valence electron. Group 2 elements have 2 valence electrons. Group 13 elements have 3 valence electrons.

The electronic configuration of an atom having atomic number '20' is?

Description : The electronic configuration of an atom having atomic number '20' is?

Last Answer : 2, 8, 8, 2

The electronic configuration of an atom having atomic number ‘20’ is (1) 2, 8, 10 (2) 2, 6, 8, 4 (3) 2, 8, 8, 2 (4) 2, 10, 8

Description : The electronic configuration of an atom having atomic number ‘20’ is (1) 2, 8, 10 (2) 2, 6, 8, 4 (3) 2, 8, 8, 2 (4) 2, 10, 8 

Last Answer : 2, 8, 8, 2

Access to raw material is the main basis for the location of- (1) Surgarcance industry (2) Aluminium industry (3) Electronic industry (4) Hi-tech industry

Description : Access to raw material is the main basis for the location of- (1) Surgarcance industry (2) Aluminium industry (3) Electronic industry (4) Hi-tech industry

Last Answer : (1) Surgarcance industry Explanation: To retain the sugar content, the cane has to be processed as soon as possible after harvesting; therefore the processing plants (mills) are located near the major areas of sugar cane production. The sucrose content depletes very fast.

NEFT is an electronic fund transfer system that operates on a _________ basis which settles transactions in batches. A. Domain Net Settlement (DNS) B. Defined Net Settlement (DNS) C. Declared Net Settlement (DNS) D. Deferred Net Settlement (DNS)

Description : NEFT is an electronic fund transfer system that operates on a _________ basis which settles transactions in batches. A. Domain Net Settlement (DNS) B. Defined Net Settlement (DNS) C. Declared Net Settlement (DNS) D. Deferred Net Settlement (DNS)

Last Answer : D. Deferred Net Settlement (DNS) Explanation: NEFT is an electronic fund transfer system that operates on a Deferred Net Settlement (DNS) basis which settles transactions in batches. In DNS, the ... till the particular cut-off time. These transactions are netted (payable and receivables) in NEFT.

Which numbering format is the basis for digital electronic circuitry? 76) A) decimal B) BCD C) octal D) binary

Description : Which numbering format is the basis for digital electronic circuitry? 76) A) decimal B) BCD C) octal D) binary

Last Answer : D) binary

Why was the system of classification of elements into triads not found suitable? -Science

Description : Why was the system of classification of elements into triads not found suitable? -Science

Last Answer : it is because all the elements discovered at that time could not be classified into triads.

where can you find a listing of specific information elements that identify their classification, reason for classification, downgrading, and declassification information?

Description : where can you find a listing of specific information elements that identify their classification, reason for classification, downgrading, and declassification information?

Last Answer : When derivatively classifying information, where can you find a listing of specific information elements that identify their classification, reason for classification, downgrading, and declassification ... InformationDoD 5220.22-M, National Industrial Security Program Operating Manual (NISPOM)

When derivatively classifying information, where can you find a listing of specific information elements that identify their classification, reason for classification, downgrading, and declassification information?

Description : When derivatively classifying information, where can you find a listing of specific information elements that identify their classification, reason for classification, downgrading, and declassification information?

Last Answer : When derivatively classifying information, where can you find a listing of specific information elements that identify their classification, reason for classification, downgrading, and declassification ... InformationDoD 5220.22-M, National Industrial Security Program Operating Manual (NISPOM)

Name the scientists who made the classification of elements in the nineteenth century.

Description : Name the scientists who made the classification of elements in the nineteenth century.

Last Answer : Name the scientists who made the classification of elements in the nineteenth century.