MCQ Chapter 5 General Science Class 8 Maharashtra Board MCQ For All Chapters – General Science Class 8Inside the Atom 1. What is meant by matter according to the document?Energy in the form of lightAnything that occupies space and has massA collection of electrons onlyThe nucleus of an atomQuestion 1 of 202. What is the smallest unit of matter as described in the document?MoleculeAtomElectronProtonQuestion 2 of 203. Who proposed that matter is made of indivisible particles called ‘Paramanu’?DemocritusKanadDaltonThomsonQuestion 3 of 204. According to Dalton’s atomic theory, what is a key characteristic of atoms?They are divisibleThey are indestructibleThey have no massThey vary within the same elementQuestion 4 of 205. What did J.J.Thomson discover inside the atom?ProtonsNeutronsElectronsNucleusQuestion 5 of 206. How is an atom electrically neutral according to Thomson’s model?It has no charged particlesPositive charge balances the negative electronsIt contains only protonsElectrons repel the nucleusQuestion 6 of 207. What did Rutherford’s scattering experiment use to bombard the gold foil?ElectronsProtonsα-particlesNeutronsQuestion 7 of 208. What did Rutherford conclude about the location of an atom’s mass?It is spread evenly throughout the atomIt is concentrated in the nucleusIt is in the electronsIt is outside the nucleusQuestion 8 of 209. What is the main difference between Thomson’s and Rutherford’s atomic models?Thomson proposed a nucleus, Rutherford did notThomson’s model has a uniform positive charge, Rutherford’s has a nucleusRutherford’s model has no electronsThomson’s model has a central negative chargeQuestion 9 of 2010. What did Niels Bohr introduce to explain atomic stability?A solid atomStable electron orbitsA uniform mass distributionRandom electron movementQuestion 10 of 2011. What is the charge of a proton as described in the document?-1e0+1e+2eQuestion 11 of 2012. Which subatomic particle is electrically neutral?ProtonElectronNeutronNucleusQuestion 12 of 2013. Where are electrons located in an atom?In the nucleusRevolving around the nucleusInside protonsIn the neutron shellQuestion 13 of 2014. What determines the atomic number of an element?Number of neutronsNumber of electronsNumber of protonsTotal massQuestion 14 of 2015. What is the mass number of an atom?Number of protons onlyNumber of electrons and protonsTotal number of protons and neutronsNumber of neutrons onlyQuestion 15 of 2016. What is the atomic number of oxygen if it has 8 protons?816124Question 16 of 2017. How many neutrons are in a calcium nucleus with atomic number 20 and mass number 40?20406010Question 17 of 2018. What is the maximum number of electrons in the K shell?281832Question 18 of 2019. What is the electronic configuration of sodium (atomic number 11)?2, 8, 12, 8, 22, 7, 22, 8, 3Question 19 of 2020. What is the valency of an element with 3 valence electrons?3581Question 20 of 20 Loading...
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