PPT-Stability of the nucleus is related to its ratio of neutrons to protons. For low atomic

For elements of higher atomic number the ratio rises to approximately 16 to 1 As a nuclide departs from this stable ratio changes in the nucleus occur which tend to bring the product to a more stable arrangement . Chemistry. Learning Goals . To be able to . explain and draw atomic structure. Elements. Elements are the . building blocks. of all . matter. on Earth. Elements are made up of . atoms. Differences in . Isotopes. Isotopes are atoms that have the same number of protons but different numbers of neutrons. Most elements in the first two rows of the periodic table have at least 2 isotopes with one being more common than the other. Starter:. Draw a basic atom. Label all of the subatomic particles, and the two main parts of it. . II. Practice . Take Notes!. Let’s get familiar with each box on the Periodic Table. Atomic Number. 10/29/14. Changes Matter. Period 1. Period 4. Period 5. Period 6. CATALYST. What do you think an atom is?. *Answer in complete sentences!. Homework:. Binder. Notes (front). TURN IN write-ups if you didn’t yesterday. Chapter 1D. Warm Up November . 28. What is smaller, an atom or a cell? . Name and describe one element that you are familiar with on the periodic table. . When large blooms of algae die, decomposers use all the oxygen in the water to break down the dead algae. What is this a result of? . This is the TITLE of your notes!. Elements. Elements are names given to specific atoms. . Each element has its own special characteristics and make-up.. Atoms = Elements. Compare the oxygen atom to the element box below. Are there any similarities?. All atoms of an element have the same number of protons and the same atomic number.. Learning Goal . Given the atomic number and the mass number of an atom, state the number of protons, neutrons, and electrons.. https://youtu.be/. hhbqIJZ8wCM. What is an Atom?. The simplest particle of an element that retains its properties.. Who is Democritus?. This Greek philosopher was among the first to suggest the existence of atoms . 2. Nuclear Physics. Back to Rutherford and his discovery of the nucleus. Also coined the term “proton” in 1920, and described a “neutron” in 1921. Neutron discovered by Chadwick in 1932. Ernest Rutherford. Pre-AP Chemistry. Charles Page High School. Stephen L. Cotton . Section 4.1 Defining the Atom. OBJECTIVES:. Describe. Democritus’s ideas about atoms.. Section 4.1 Defining the Atom. OBJECTIVES:. Explain. Over the past century scientist have discovered that the atom is composed of 3 subatomic particles:. Protons. Neutrons. Electrons. Checking for understanding. Draw this diagram. Label all subatomic particles and include their charges.. Examples:. Hydrogen. Carbon. Chlorine. Titanium. Atom. Democritus (450 B.C.). If . you kept cutting a substance in half forever, eventually you would end up with an “. uncuttable. ” particle. . John Dalton (1800). By . Dr. . Sarab. . Alazawi. Atomic structure. The atom is the smallest part of matter that represents a particular element.. There . are three major atomic (or subatomic) particles: Protons, Neutrons and Electrons. Table below summarizes the characteristics of these three subatomic particles. The masses of the subatomic particles are listed in two ways, grams and . Rutherford. uncovered the first nuclear building block.. A . beam of alpha particles scattered off nitrogen gas.. A . new particle emerged that was positively charged like the alpha particles, but behaved more like the hydrogen nuclei previously observed in other experiments..