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You Are On Question Answer Bank SET 2031
101551. The term Green 'Chemistry was coined by?
Answer: Paul. T. Anastas
101552. The concept dual nature of Matter was put forward by?
Answer: Louis de-Broglie
101553. The construction of electron microscope was based on?
Answer: Dual Nature of Matter
101554. The dual nature of electrons was experimentally proved by?
Answer: I.H. Germer
101555. Basic unit of Chemistry?
Answer: Atom
101556. Smallest units of a matter?
Answer: Atom
101557. Atom was derived from a Greek word?
Answer: 'Atomos' (means indivisible)
101558. Atom was discovered by John?
Answer: Dalton
101559. Law of Multiple Proportion was put forward by?
Answer: John Dalton
101560. The term 'atom' was coined by?
Answer: Ostwald
101561. The fundamental particles of an atom?
Answer: Proton; Electron and Neutron
101562. The central part of an atom is?
Answer: Nucleus
101563. The sub atomic particles of Nucleus are?
Answer: Protons and Neutrons
101564. Heaviest sub atomic particle us?
Answer: Neutron
101565. Lightest sub atomic particle is?
Answer: Electron
101566. Moving particle of an atom is?
Answer: Electron
101567. The charge of an Electron is?
Answer: Negative
101568. Protons and Neutrons are collectively known as?
Answer: Nucleons
101569. Chemical property of a substance is determined by?
Answer: Electrons
101570. The smallest atom is?
Answer: Helium (He)
101571. The simplest atom is?
Answer: Hydrogen (H)
101572. Biggest known atom is?
Answer: Francium (Fr)
101573. The unit of measuring mass of an atom is?
Answer: Atomic Mass Unit (amu)
101574. 1 atomic mass unit is equal to?
Answer: 1.6605 x 10^-27 Kg
101575. The element used to find amu?
Answer: Carbon-12
101576. Electron is discovered by?
Answer: J.J. Thomson
101577. The name Electron was proposed by?
Answer: Stoney
101578. Charge of an electron?
Answer: 1.6 x 10^-19C (determined by Millikan)
101579. Mass of electron?
Answer: 9.1 x 10^-31 kg
101580. Dual nature of electron?
Answer: Louis-de-broglie
101581. Proton was discovered by?
Answer: Ernest Rutherford
101582. The identity card of an element?
Answer: Proton
101583. The mass of a proton is?
Answer: 1.672 x 10-27 kg
101584. The theory of Proton was presented by?
Answer: William Prout
101585. Neutron was discovered by?
Answer: James Chadwick in 1932
101586. The heaviest fundamental particle of an atom?
Answer: Neutron
101587. The least stable particle?
Answer: Neutron
101588. Chargeless particle of an atom?
Answer: Neutron
101589. The atom without neutron?
Answer: Protium (Isotope of Hydrogen)
101590. Atomic number is?
Answer: It is the number of protons in the nucleus of an atom
101591. Atomic number is denoted by the alphabet?
Answer: Z
101592. Mass number is?
Answer: The total number of protons and neutrons present in the nucleus of an atom
101593. Mass number is denoted by alphabet?
Answer: A
101594. Atomic Theory was propounded by?
Answer: John Dalton
101595. Uncertainty Principle was propounded by?
Answer: Werner Heisenberg
101596. Structure of Atom was discovered by?
Answer: Niels Bohr
101597. Plum Pudding Model was discovered by?
Answer: J.J. Thomson
101598. Wave Mechanics Model was discovered by?
Answer: Max Planck
101599. Electron (-ve charge) was discovered by?
Answer: J.J. Thomson
101600. Proton (+ve charge) was discovered by?
Answer: Ernest Rutherford
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