The Modern View of Atomic Structure; Atomic Weights (Sections)
Write the correct symbol, with both superscript and subscript, for each of the following. Use the list of elements in the front inside cover as needed:
(a) the isotope of platinum that contains 118 neutrons, (b) the isotope of krypton with mass number 84, (c) the isotope of arsenic with mass number 75, (d) the isotope of magnesium that has an equal number of protons and neutrons.
Chapter 2.1 The Rutherford Model of Atomic Structures th The end of the 19 century, realized atoms were not the smallest particles of matter Made up of smaller subatomic particles o The neutrons, protons, and electrons in an atom Electron o J.J Thomson set out to better understand how gases conduct electricity o Cathode rays: streams of electrons emitted by the cathode in a partially evacuated tube o Discovered cathode- ray becomes can be deflected by magnetic and electric fields o Discovered electrons are fundamental particles that occur in all forms of matter o Robert Millikan discovered the charge and mass o Ion: an atom or molecule that has a positive or negative char