Hi.Dox
Name: ___________________________
1. ____ According to the wave-mechanical model of the atom, electrons in an atom (1) travel in defined circles (3) have a positive charge (2) are most likely found in an excited state (4) are located in orbitals outside the nucleus 2. ____ What is the total charge of the nucleus of a carbon atom? (1) –6 (2) 0 (3) +6 (4) +12 3. ____ When an atom loses one or more electrons, this atom becomes a (1) positive ion with a radius smaller than the radius of this atom (2) positive ion with a radius larger than the radius of this atom (3) negative ion with a radius smaller than the radius of this atom (4) negative ion with a radius larger than the radius of this atom 4. ____ Which electron configuration could represent a strontium atom in an excited state? (1) 2–8–18–7–1 (3) 2–8–18–8–1 (2) 2–8–18–7–3 (4) 2–8–18–8–2 5. ____ Which grouping of circles, when considered in order from the top to the bottom, best represents the relative size of the atoms of Li, Na, K, and Rb, respectively? 6. ____ What is the total number of neutrons in an atom of (1) 26 (2) 31 (3) 57
57 Fe? 26
(4) 83
7. ____ Compared to an electron in the first electron shell of an atom, an electron in the third shell of the same atom has (1) less mass (2) less energy (3) more mass (4) more energy 8. ____ An atom in the ground state contains a total of 5 electrons, 5 protons, and 5 neutrons. Which Lewis electron-dot diagram represents this atom?
9. Determine the percent composition by mass of oxygen in the compound C6H12O6.
State, in terms of subatomic particles, how an atom of C-13 is different from an atom of C-12.
10. ____ What was concluded about the structure of the atom as the result of the gold foil experiment? (1) A positively charged nucleus is surrounded by positively charged particles. (2) A positively charged nucleus is surrounded by mostly empty space. (3) A negatively charged nucleus is surrounded by positively charged particles. (4) A negatively
1. ____ According to the wave-mechanical model of the atom, electrons in an atom (1) travel in defined circles (3) have a positive charge (2) are most likely found in an excited state (4) are located in orbitals outside the nucleus 2. ____ What is the total charge of the nucleus of a carbon atom? (1) –6 (2) 0 (3) +6 (4) +12 3. ____ When an atom loses one or more electrons, this atom becomes a (1) positive ion with a radius smaller than the radius of this atom (2) positive ion with a radius larger than the radius of this atom (3) negative ion with a radius smaller than the radius of this atom (4) negative ion with a radius larger than the radius of this atom 4. ____ Which electron configuration could represent a strontium atom in an excited state? (1) 2–8–18–7–1 (3) 2–8–18–8–1 (2) 2–8–18–7–3 (4) 2–8–18–8–2 5. ____ Which grouping of circles, when considered in order from the top to the bottom, best represents the relative size of the atoms of Li, Na, K, and Rb, respectively? 6. ____ What is the total number of neutrons in an atom of (1) 26 (2) 31 (3) 57
57 Fe? 26
(4) 83
7. ____ Compared to an electron in the first electron shell of an atom, an electron in the third shell of the same atom has (1) less mass (2) less energy (3) more mass (4) more energy 8. ____ An atom in the ground state contains a total of 5 electrons, 5 protons, and 5 neutrons. Which Lewis electron-dot diagram represents this atom?
9. Determine the percent composition by mass of oxygen in the compound C6H12O6.
State, in terms of subatomic particles, how an atom of C-13 is different from an atom of C-12.
10. ____ What was concluded about the structure of the atom as the result of the gold foil experiment? (1) A positively charged nucleus is surrounded by positively charged particles. (2) A positively charged nucleus is surrounded by mostly empty space. (3) A negatively charged nucleus is surrounded by positively charged particles. (4) A negatively