Atomic Model Scientists Nuclear Chem ParticlesPotpourri Final

Atomic Model 100 Atomic Model Name the apparatus used to discover the electron Answer Answer

Atomic Model Atomic Model 100 Cathode ray tube

Atomic Model 200 Atomic Model Name the scientist who discovered the electron. Name the atomic model that was a result of this discovery. Answer Answer

Atomic Model Atomic Model 200 J. J. Thomson Plum Pudding Model

Atomic Model 300 Atomic Model What conclusion can be drawn from the fact that most of the alpha particles passed straight through the foil in the Gold Foil Experiment? Answer Answer

Atomic Model Atomic Model 300 An atom is mostly empty space.

Atomic Model 400 Atomic Model What conclusion can be drawn from the fact that a few of the alpha particles were deflected by (bounced back from) the foil in the Gold Foil Experiment? Answer Answer

Atomic Model Atomic Model 400 Answer Atoms have a small, dense, positive nucleus.

Atomic Model 500 Atomic Model Draw and label the Plum Pudding Model. Answer

Atomic Model Atomic Model 500 Answer

Scientists 100 Scientists Name the scientist who used the Oil Drop Experiment to determine the charge on an electron. Answer Answer

Scientists Scientists 100 Answer Millikan

Scientists 200 Scientists Describe three of Marie Curie’s unique accomplishments as a scientist. Answer

Scientists Scientists 200 Answer Helped discover radioactivity. Discovered and named two new elements. First woman to earn a Nobel Prize. First person to win 2 Nobels. Established use of X-Rays in WWI.

Scientists 300 Scientists Name the discoverer of the neutron. Answer Answer

Scientists Scientists 300 James Chadwick

Scientists 400 Scientists Describe two corrections to Dalton’s 1808 Atomic Theory. Answer Answer

Scientists Scientists 400 Answer Atoms are divisible (they are made of smaller particles) Atoms of same element can have different masses (isotopes) Atoms can be created and destroyed (nuclear chemistry)

Scientists 500 Scientists Name the scientists credited with the discovery of radioactivity. Explain how this discovery changed the idea of the “indivisible” atom. Answer Answer

Scientists Scientists 500 Answer Henri Becquerel, Marie Curie, Pierre Curie The fact that something can be emitted from the atom indicated that it must have subatomic particles.

Nuclear Chem 100 Nuclear Chem A 4.00 g sample of Francium- 210 decays to a 1.00 g sample in 5.2 min. What is the t 1/2 of this isotope? Answer Answer

Nuclear Chem Nuclear Chem 100 Answer 4.00 g to 2.00 g in one half life 2.00 g decays to 1.00 g in 2 nd half life 5.2/2 = 2.6 min= t 1/2

Nuclear Chem 200 Nuclear Chem What type of radioactive decay results in energy only being emitted from the nucleus? Answer

Nuclear Chem Nuclear Chem 200 Gamma decay – emits gamma rays

Nuclear Chem 300 Nuclear Chem Write the nuclear chemical equation for the beta decay of rubidium-90. Answer Answer

Nuclear Chem Nuclear Chem 300 Answer

Nuclear Chem 400 Nuclear Chem Write the nuclear symbol of the new element produced when Neptunium-237 (Np) undergoes alpha decay. Answer Answer

Nuclear Chem Nuclear Chem 400 Answer

Nuclear Chem 500 Nuclear Chem What scientist discovered the nucleus of the atom and later the proton? Name and label the new model generated from this discovery. Answer Answer

Nuclear Chem Nuclear Chem 500 Ernest Rutherford Planetary Model electron in orbit dense, positive nucleus empty space

Particles 100 Particles Name the particle that has about the same mass as a proton but no electric charge. Answer Answer

Particles Particles 100 Answer Neutron

Particles 200 Particles Write the complete nuclear symbol for the particle that has 48 protons 64 neutrons 46 electrons Answer Answer

Particles Particles 200 Answer

Particles 300 Particles Give the number of protons, neutrons and electrons in potassium-40. Answer Answer

Particles Particles 300 Answer 19 protons 21 neutrons 19 electrons

Particles 400 Particles Give the number of protons neutrons and electrons for the most abundant isotope of B 3- Answer Answer

Particles Particles protons 6 neutrons 8 electrons

Particles 500 Particles Name the force which holds together the particles in the nucleus. Explain why it is strange to us. Answer Answer

Particles Particles 500 Nuclear Force It is strange because like charges usually repel, yet many positive charges are held together in small space.

100 Potpourri For the Electron Cloud Model, name the scientist credited with its discovery and explain the many tiny dots. Answer Answer

Potpourri 100 Schrodinger Dots represent probability of locating an electron in a particular region. Where the dots are densest, an electron is more likely to be found. Where there are few or no dots, an electron is unlikely.

200 Potpourri Give two reasons why the Bohr Model is invalid. AnswerAnswer

Answers for Potpourri It is impossible to predict a specific location and momentum (energy) for an electron. (Heisenberg Uncertainty Principle) 2.The math does not correspond to data for any atom other than H (one electron)

300 Potpourri Name the two main regions of the atom. Which region occupies most of the volume of the atom? Which region has most of the atom’s mass? Answer Answer

Potpourri 300 The two regions are the nucleus and the electron cloud. The electron cloud constitutes most of the volume of the atom and is mostly empty space. The nucleus contains most of the atom’s mass.

400 Potpourri A reaction between 46 g of sodium and 71g of chlorine will produce how much salt (NaCl)? Answer Answer

Potpourri 400 Answer 117 g (Law of Conservation of Mass)

500 Potpourri Give chemical formulas of two compounds which support the Law of Multiple Proportions. Answer Answer

Potpourri 500 Answer CO 2 and CO Also, N 2 O and N 2 O 4 (Same elements can combine in different whole number ratios to form different compounds)

Final Jeopardy Draw and explain the Indivisible Atom Model. Who first described this model? Answer

Final Jeopardy Answer It is a solid sphere with no smaller parts inside. First proposed by Democritus (Greeks) 400 BC