1) What makes up the nucleon number? a) number of electrons b) number of neutrons c) number of protons 2) What is the formula to calculate the number of neutrons in an atom? a) proton number - nucleon number b) nucleon number - proton number c) proton number + nucleon number 3) What is the mass / nucleon number of a particle with 4 protons, 5 neutrons and 3 electrons? a) 4 b) 5 c) 7 d) 8 e) 9 4) What is the nuclide notation for an atom X with 5 protons, 6 neutrons and 5 electrons. a) 511X b) 65X c) 611X d) 115X e) 116X 5) What is the atomic / proton number of carbon? [check the Periodic Table] a) 6 b) 12 c) 5 d) 11 6) An atom has nucleon number 18 and proton number 8. How many electrons does this atom have? a) 8 b) 10 c) 18 7) An atom has nucleon number 18 and proton number 8. How many neutrons does this atom have? a) 8 b) 10 c) 18 8) The nuclide notation for an atom is 2311Na. What is the nucleon number of this atom? a) 11 b) 12 c) 23 9) Isotopes are atoms of the same element with the same number of ....(1).... but different number of ....(2).... a) neutrons, protons b) electrons, neutrons c) protons, neutrons d) protons, electrons 10) Which two atoms are isotopes? a) 2412W b) 2312X c) 2311Y d) 2513Z 11) Atom A has 3 protons and 4 neutrons. Atom B has 3 protons and 3 neutrons. Are A and B isotopes? a) No b) Yes

[D-E] Nuclide notation and isotopes

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