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- Subject
- Periodic Classificationchemistry-mcqs › periodic-classification
- Published
- 18 Mar 2019
- Last updated
- 28 May 2026
Explanation
The concept of Triads, grouping elements into sets of three with similar properties, was first proposed by Dobereiner. Newlands, Mendeleev, and Al-Razi contributed to other developments in chemistry, but Dobereiner introduced this specific idea.
More Periodic Classification MCQs
Practice related questions from the same subject.
- 1.Which of the following statements about metals is false?
- 2.Considering atomic sizes, which of the following comparisons is accurate?
- 3.Why does iodine exist in a solid state under standard conditions?
- 4.What term is used for halides where halogen atoms serve as bridges connecting two atoms of another element?
- 5.What does the oxidation state of an atom indicate?
- 6.How does the metallic character of alkali metals change as you move down the group?
- 7.What is the nature of the energy change when a second electron is added to a singly charged negative ion?
- 8.Which factors influence the ionization energy of an atom?
More in Chemistry Mcqs
- Alcohols Phenols and Ethers
- Aldehydes and Ketones
- Aliphatic Hydrocarbons
- Alkyl Halides
- Aromatic Hydrocarbons
- Atomic Structure
- Carboxylic Acids
- Chemical Bonding
- Chemical Equilibrium
- Chemistry Basic Concept
- Common Chemical Industries
- Diagnostic Test
- Electrochemistry
- Environmental Chemistry
- Experimental Techniques
- Gases
- Group III A and IVA Elements
- Group VA and VIA Elements
- Liquids and Solids
- Macromolecules
- Organic Chemistry
- Reaction Kinetics
- S-BLOCK ELEMENTS
- Solutions
- The Halogens and The Noble Gases
- Thermochemistry
- Transition Elements