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Topic 3 - The Atomic Structure
5. Cont.
8. What is the nuclear charge of an atom with 16 protons, 18 electrons, and 17 neutrons?
2) +33
1) +16
4) +17
3) +18
9. Which is true of an atom with 76 electrons, 117 neutrons, and a mass number 198 ?
1) It has 79 protons and 315 nucleons
3) It has 79 protons and 198 nucleons
2) It has 41 protons and 315 nucleons 4) It has 41 protons and 198 nucleons
10. An atom with 21 neutrons and 40 nucleons has
1) A nuclear charge of +19 3) A mass number of 61
4) A mass number of 19
2) A nuclear charge of +40
11. A neutral atom with atomic number of 9 and a mass number of 17 will also have
1) 9 protons, 9 electrons, and 9 neutrons 3) 9 protons, 9 electrons, and 8 neutrons
2) 9 protons, 8 electrons, and 9 neutrons 4) 9 protons, 8 electrons, and 8 neutrons
Teacher Preview Copy
Teacher Preview Copy
12. Which is true of a neutral atom with 35 protons and a mass number of 80?
3) It has 45 electrons and 80 neutrons
1) It has 35 electrons and 35 neutrons
2) It has 35 electrons and 45 neutrons 4) It has 45 electrons and 115 neutrons
6. Number of particles: Determining identity of an element from number of particles.
1. Atom X has 16 protons, 18 electrons, and 17 neutrons. Which element is atom X?
1) S 2) Ge 3) In 4) Cl
2. An atom of which element could have a mass number of 39 and 20 neutrons? 4) Pr
2) Ca
1) Y
3) K
3. A neutral atom with 7 electrons and 8 neutrons could be of element
1) Nitrogen 2) Oxygen 3) Sulfur 4) Hydrogen
4. A neutral atom with 179 nucleons and 101 neutrons could be of element
1) Au 2) Md 3) Si 4) Se
5. Which neutral atom could have 15 electrons, 17 neutrons and a mass of 32? 4) Cadmium
3) Chlorine
1) Germanium
2) Phosphorous
6. Which element could have a mass number of 86 atomic mass unit and 49 neutrons in its nucleus?
4) Au
1) In
2) Rb
3) Rn
7. An atom of fluorine has a mass of 19 amu. The total number of protons and neutrons in its nucleus is
1) 9 2) 10 3) 19 4) 28
8. A neutral magnesium atom with 26 nucleons and 12 electrons will also has
1) 26 protons and 12 neutrons
3) 12 protons and 38 neutrons
2) 26 protons and 14 neutrons 4) 12 protons and 14 neutrons
7. Isotopes: Recalling concept facts and definitions
1. All atoms of the same element with the same number of protons but different number of neutrons
are called
1) Charge atoms 2) Charged nuclei 3) Isomers 4) Isotopes
2. Isotopes of an element have different
1) Number of electrons 2) Number of protons 3) Atomic numbers 4) Mass numbers
3. Isotopes are atoms that have the same number of protons but a different
1) Atomic number 2) Number of neutron 3) Nuclear number 4) Positron
4. All isotopes of a given atom have
1) The same mass number and the same atomic number
2) The same mass number but different atomic number
3) Different mass number but the same atomic number
4) Different mass number and different atomic number
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 167
Topic 3 - The Atomic Structure
5. Cont.
8. What is the nuclear charge of an atom with 16 protons, 18 electrons, and 17 neutrons?
2) +33
1) +16
4) +17
3) +18
9. Which is true of an atom with 76 electrons, 117 neutrons, and a mass number 198 ?
1) It has 79 protons and 315 nucleons
3) It has 79 protons and 198 nucleons
2) It has 41 protons and 315 nucleons 4) It has 41 protons and 198 nucleons
10. An atom with 21 neutrons and 40 nucleons has
1) A nuclear charge of +19 3) A mass number of 61
4) A mass number of 19
2) A nuclear charge of +40
11. A neutral atom with atomic number of 9 and a mass number of 17 will also have
1) 9 protons, 9 electrons, and 9 neutrons 3) 9 protons, 9 electrons, and 8 neutrons
2) 9 protons, 8 electrons, and 9 neutrons 4) 9 protons, 8 electrons, and 8 neutrons
Teacher Preview Copy
Teacher Preview Copy
12. Which is true of a neutral atom with 35 protons and a mass number of 80?
3) It has 45 electrons and 80 neutrons
1) It has 35 electrons and 35 neutrons
2) It has 35 electrons and 45 neutrons 4) It has 45 electrons and 115 neutrons
6. Number of particles: Determining identity of an element from number of particles.
1. Atom X has 16 protons, 18 electrons, and 17 neutrons. Which element is atom X?
1) S 2) Ge 3) In 4) Cl
2. An atom of which element could have a mass number of 39 and 20 neutrons? 4) Pr
2) Ca
1) Y
3) K
3. A neutral atom with 7 electrons and 8 neutrons could be of element
1) Nitrogen 2) Oxygen 3) Sulfur 4) Hydrogen
4. A neutral atom with 179 nucleons and 101 neutrons could be of element
1) Au 2) Md 3) Si 4) Se
5. Which neutral atom could have 15 electrons, 17 neutrons and a mass of 32? 4) Cadmium
3) Chlorine
1) Germanium
2) Phosphorous
6. Which element could have a mass number of 86 atomic mass unit and 49 neutrons in its nucleus?
4) Au
1) In
2) Rb
3) Rn
7. An atom of fluorine has a mass of 19 amu. The total number of protons and neutrons in its nucleus is
1) 9 2) 10 3) 19 4) 28
8. A neutral magnesium atom with 26 nucleons and 12 electrons will also has
1) 26 protons and 12 neutrons
3) 12 protons and 38 neutrons
2) 26 protons and 14 neutrons 4) 12 protons and 14 neutrons
7. Isotopes: Recalling concept facts and definitions
1. All atoms of the same element with the same number of protons but different number of neutrons
are called
1) Charge atoms 2) Charged nuclei 3) Isomers 4) Isotopes
2. Isotopes of an element have different
1) Number of electrons 2) Number of protons 3) Atomic numbers 4) Mass numbers
3. Isotopes are atoms that have the same number of protons but a different
1) Atomic number 2) Number of neutron 3) Nuclear number 4) Positron
4. All isotopes of a given atom have
1) The same mass number and the same atomic number
2) The same mass number but different atomic number
3) Different mass number but the same atomic number
4) Different mass number and different atomic number
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 167
