PREDICTING THE PROBABLE LOCATION OF AN ELECTRON REVIEW 1. This refers to the ultimate indivisible particle of matter. A. Atom B. Compound C. Element D. Molecule 2. On the basis of Rutherford’s model of an atom, which subatomic particle is present in the nucleus of an atom? A. proton and electron B. proton and neutron C. neutron and electron D. proton only 3. It is a test performed to identify an element in a compound based on the color of light produced. A. Boiling point test B. Carbon dioxide test C. Flame test D. Carbon test 4. Which statement is incorrect? A. Orbital is a region in an atom where an electron can be found. B. An electron can absorb energy when it jumps to a higher energy level. C. An electron can emit energy when it jumps to a higher energy level. D. Filling of electrons in an atom start from lower energy level to highest energy level. 5. What occur when an electron moves from high energy level to a low one? A. another electron goes from a low energy level to a high one B. the atom moves faster C. colored light is given off D. this process is not possible 6. Which of the following is NOT true about the sub-atomic particles of atom? A. The nucleus is the central part. B. The proton and electrons are found inside the nucleus. C. The electron is a negatively charge particle. D. The proton has positive charge. 7. The state or condition when atom released energy in a form of color after absorbing heat. A. Excited State B. Ground State C. Liquid State D. Evaporation State 8.When an electron falls back to its original energy level, it A. EMITS ENERGY. B. ABSORBS ENERGY. C. TRANSFERS ENERGY. D. STORES ENERGY. 9. The symbol “n” in the Bohr theory of atomic structure refers to A. the energy of electron B. the total energy of the atom C. the number of electron in an energy level D. the orbit in which an electron is found. 10. Which of the following statements is NOT true of the atomic model of Bohr? A. The hydrogen is made up of a positively charged nucleus. B. The electron revolves around the nucleus in a circular orbit. C. The energy of the electron in a given orbit is not fixed. D. An electron can absorb or emit a quantity of radiation. Activity 3: PREDICTING THE PROBABLE LOCATION OF AN ELECTRON It is not possible to Electrons are found know the exact in definite orbits position of the around the nucleus electrons Erwin Louie de Karl There is only Schrodinger a probabilityWerner that the Broglie Heisenberg - Math equation electron can be found in certain - electron as a - Uncertainty for hydrogen volume the nucleus. wave in space around Principle atom Volume or region of space around the nucleus where the electron is most likely be found - Views an electron as a cloud of negative charge having a certain geometrical shapes Electron Configurations OBJECTIVE 1. Write the electron configuration of the elements in the third period 3. Tape the paper on the floor so that it will not move. 4. Stand on the opposite side of the target from your partner. Hold a pencil or marker at chest level above the center of the circles you have drawn. 5. Take turns dropping the pencil or marker so that it will leave 100 dots on the circles drawn on paper or folder. 6. Count the number of dots in each circle and record that number on the data table. 7. Calculate the number of dots per square centimeter (cm2). 8. Using a graphing paper, plot the average distance from the center on the x-axis and number of dots per sq.cm on the y-axis.