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Download Unit 1 Activity 2 Quiz - Nuclear Model and Isotopes SC 2019 FALL-CHM151AA 20919
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Unit 1 Activity 2 Quiz - Nuclear Model and Isotopes Question 1 1 / 1 pts Rutherford’s gold foil experiment directly indicated that: (Select all that apply) negative charges circle the nucleus like planets around the sun positive charge is concentrated in a very small core at the atom’s center positive charges are dispersed throughout the atom the nucleus of an atom occupies most an atom’s volume ect Question 2 0 / 1 pts Which part of the atomic model proposed by Rutherford was “invented” by the scientist to make the model more complete? (Select all that apply) positive charges are dispersed throughout the atom negative charges circle the nucleus like planets around the sun the nucleus of an atom occupies most an atom’s volume positive charge is concentrated in a very small core at the atom’s center Question 3 1 / 1 pts What is the difference between a neutral atom of 59Co and a neutral atom of 59Ni ? The number of protons and neutrons only The number of protons and electrons only The number of neutrons only The number of protons, neutrons, and electrons Question 4 1 / 1 pts A sample of element Z contains 60% of 69Z and 40% of 71Z. What is the average atomic mass of element Z? 69.8 69.2 70.2 70.0 1 / 1 pts Question 5 Consider the following atoms containing the indicated number of protons and neutrons: Atom A: 20 protons and 20 neutrons Atom B: 21 protons and 19 neutrons Atom C: 18 protons and 22 neutrons Atom D: 20 protons and 22 neutrons Which two atoms from the list above would be considered isotopes of the same element? Atom C and Atom D Atom B and Atom C Atom A and atom B Atom A and Atom D Quiz Score: 4 out of 5
