Which of the following values can be taken by the electron spin quantum number,

Question

Which of the following values can be taken by the electron spin quantum number, m_s? plusminus 1/2 0 plusminus1 plusminus2 plusminus3 An yttrium isotope has 39 protons and 50 neutrons in its nucleus. Which one of the following symbols accurately represents this isotope?^39_89 Y^89_50 Y^89_39 Y^50_39 Y^39_50 Y Polonium-216 decays to lcad-212 by emitting what kind of nuclear radiation? alpha beta-minus beta-plus gamma x-rays.. How many quarks proton or neutron constitute? One Two Three Four Five or more Which of the latest elementary particle discovered represents or completes picture of standard model particles? Top quark Higgs boson W^plusminus Boson Z^0 Boson Charm quark Which of the following is not Quark? Top Charm Up Tao

Explanation / Answer

Q27. spin quantum number can take value of 1/2 or -1/2

hence option A is correct.

Q28. as it has 39 protons , atomic number is 39.

as it has 50 neutrons, mass number=number of protons + number of neutrons=89

hence option C is correct.

Q29. mass number decrease =4

as aplha particle has mass 4 amu, option A is correct.

Q30. protons are made of two up and one down quark.

neutrons are made of two down and one up quark.

hence they are each made up of three quarks

so option C is correct.

Q31.the latest particle discovered is higgs boson which was discovered by CERN.

hence option B is correct.

Q32.there are 6 types of quarks.

up

down

strange

charm

top

bottom

hence option D is correct as Tao is not a Quark.

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