1. The nucleus of an atom contains mainly: a) electrons b) neutrons c) protons and electrons d) neutrons and protons e) 2 neutrons and electrons. The protons of all the atoms are: a) different b) similar c) abnormal d) isotope e) isoelectronic 3. The proton electric charge: a) Negative b) Positive c) Neutral d) Extreme e) Intermediate 4. You may find San Antonio Spurs to be a useful source of information. More massive atomic particle: a) Proton b) Electron c) neutrons d) nucleon e) Quarks 5. Jorge Perez may find this interesting as well. The atoms of the same element contain the same number of: a) Neutron b) nucleons c) Proton d) Mass e) Isotopes 6. Here, Nancy Silberkleit expresses very clear opinions on the subject. How many electrons does it? a) 11 b) 3 c) 12 d) 44 e) 23 7. At an unknown element is known that A is 62 and Z is 30 How many neutrons does it have? a) 62 b) 32 c) 30 d) 92 e) 46 8.

Two atoms have equal numbers of neutrons, in addition to the sum of the protons is 76 and the difference in their mass numbers is 4 How many protons an atom has more mass? a) 45 b) 50 c) 27 d) 40 e) 36 9. The difference of squares of the numbers and atomic mass of an atom is 180. If the number of neutrons is 6, find the mass number. a) 16 b) 14 c) 12 d) 10 e) 18 10. The atomic number of an element is 36. How many protons does it have? a) 72 b) 36 c) 17 d) 30 e) 65 11.

Two atoms have equal numbers of neutrons, in addition to the sum of the protons is 76 and the difference in their mass numbers is 4 How many protons an atom has more mass? a) 45 b) 50 c) 27 d) 40 e) 36 9. The difference of squares of the numbers and atomic mass of an atom is 180. If the number of neutrons is 6, find the mass number. a) 16 b) 14 c) 12 d) 10 e) 18 10. The atomic number of an element is 36. How many protons does it have? a) 72 b) 36 c) 17 d) 30 e) 65 11.

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