Teoria y Estructura Atómica The Periodic Table of Elements II: History and development por Katie Grace Carpenter, M.S. Lectura Prueba Enseñe con esto Use the periodic table below to answer questions 4 and 9. image ©Visionlearning 1. Which of the following specific characteristics of a standard deck of cards inspired the development of the periodic table? A standard deck consists of unique cards that all fall under certain categories, or "suits." A standard deck contains numbered cards plus face cards. There are 52 cards in a standard deck. One of the four suits is represented by a spade. 2. The periodic table was first developed in the 1800s when Dimitri Mendeleev discovered that if you arrange the elements according to their atomic number, their chemical properties tend to repeat. true false 3. Which of the following is always true regarding atomic weight vs. atomic mass? Atomic number is always greater than atomic mass. Atomic mass is always greater than atomic number. Atomic number and atomic mass added together tell you where you'll find that element on the periodic table. An element with an atomic mass higher than atomic number will gain electrons. 4. Based on their location on the periodic table, would you predict krypton (Kr) or potassium (K) to have a higher atomic mass? Use the periodic table above to answer. Kr K It is not possible to predict. Kr and K would have the same atomic mass. 5. Besides organizing the known elements, what other benefit did Mendeleev's early periodic table provide? The periodic table indicated what layer of the Earth's crust each element might be discovered in highest quantity. Mendeleev's periodic table suggested the approximate size for an atom of each element. The periodic table benefited scientists by providing an alphabetized list for the elements to more easily identify their properties. The periodic table predicted the existence of unknown elements. 6. Which of the following is solely responsible for an element's identity? Atomic mass Atomic number Ionic change Chemical family 7. Mendeleev's Group I elements are similar to what we refer to today as the alkali metals. true false 8. Which of the following scientists is credited with helping to provide accurate measurements for the "platinum group elements"? John Newland Dimitri Mendeleev Julia Lermontova Sofia Kovalevskaia 9. Based on their location on the periodic table, which of the following elemental pairs have the smallest difference in atomic number? Use the periodic table above to answer. Argon (Ar) & potassium (K) Argon (Ar) & sodium (Na) Sodium (Na) & potassium (K) Potassium (K) & cesium (Cs) 10. Which of the following particles has the lowest mass? Protons Electrons Neutrons All three particles have the same mass. Resultados de Prueba
