1) 12 is the .... 6 is the .... a) mass number, atomic number b) mass number, neutron number c) atomic number, mass number 2) In a neutral atom, the number of protons is equals to the a) mass number b) atomic number c) number of electrons d) number of neutrons 3) ...................found at the electron shells are a) protons b) neutrons c) electrons d) protons & neutrons 4) The sub-atomic particles found in the nucleus is/ are a) protons b) neutrons c) electrons d) protons & neutrons 5) neutron has a mass of a) 1 b) +1 c) 1/1840 d) zero 6) proton has a mass of a) 1 b) +1 c) 1/1840 d) zero 7) electron has a mass of a) 1 b) +1 c) 1/1840 d) zero 8) 45 is the a) proton number b) mass number c) number of neutrons d) number of electrons 9) 21 is the  a) proton number b) mass number c) number of neutrons d) number of electrons 10) the number of neutrons is a) 45 b) 21 c) 24 d) 67 11) the number of electrons is  a) 45 b) 21 c) 24 d) 67 12) the number of nucleons a) 45 b) 21 c) 24 d) 67 13) The atomic symbol of silver is a) Si b) Sl c) Ag d) Sv 14) The atomic symbol of gold is a) Go b) Gd c) Gl d) Au 15) The atomic symbol of potassium is a) P b) Pm c) Pt d) K 16) 59 is the  a) proton number b) mass number c) number of neutrons d) number of electrons 17) 27 is the  a) proton number b) mass number c) number of neutrons d) number of electrons 18) 27 is also known as a) atomic number b) mass number c) number of neutrons d) number of electrons 19) the number of neutrons is a) 27 b) 59 c) 32 d) 86 20) the number of nucleons is a) 27 b) 59 c) 32 d) 86

Atomic Structure

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