PPT-Average atomic mass worksheet

Author : danika-pritchard | Published Date : 2016-07-06

1 Rubidium has two common isotopes 85 Rb and 87 Rb If the abundance of 85 Rb is 722 and the abundance of 87 Rb is 278 what is the average atomic mass of rubidium

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Average atomic mass worksheet: Transcript


1 Rubidium has two common isotopes 85 Rb and 87 Rb If the abundance of 85 Rb is 722 and the abundance of 87 Rb is 278 what is the average atomic mass of rubidium PROCEDURE. Mass of individual atoms. Lesson 1 – introduction to project and atomic structure. The Atomic mass unit (. amu. ). Atomic particle. Real mass (g). Relative mass (. amu. ). Proton p. +. What is it?. Isotopes are different versions of atoms having the same number of protons but different numbers of neutrons.. Atomic Mass. The mass of each isotope is different due to the different number of neutrons.. The lab technician shown here is using a magnifying lens to examine a bacterial culture in a petri dish. When scientists cannot see the details of what they study, they try to obtain experimental data that help fill in the picture.. 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 . 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. Chapter 3. Types of Models – Why do we use models?. Physical Model vs. Conceptual Model. Physical model. is a representation of a very large or small object shown at a convenient scale. . FDR receives a letter from Albert Einstein. Informed FDR of recent developments in splitting uranium atoms. Could lead to “extremely powerful bombs of a new type” by means of nuclear fission. Nucleus absorbs a neutron, breaks into two equal fragments. Steps for Calculating Average Atomic Mass. (. When given percentages of each isotope and each isotopes mass). 1. Convert the percentages into decimals. (This percentage is known as . its . relative . #1: Rubidium has two common isotopes, . 85. Rb and . 87. Rb. . If the abundance of . 85. Rb is 72.2% and the abundance of . 87. Rb is 27.8%, what is the average atomic mass of rubidium?. PROCEDURE:. Composition of Substances and Solutions Atomic Mass and Formula Mass; Mole & Molar Mass; Percent Composition of Compounds; Determination of Empirical & Molecular Formulas; Molarity Other Units for Solution Concentrations III. How atoms differ. . A. Atomic Number. Equal to the number of protons – never changes; equals the number of electrons if AND ONLY IF the atom is . neutral. ; Moseley discovered . each atom has a unique number of protons in the nucleus. 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.. 2.3: Atomic structure & symbolism. Write & interpret symbols that depict atomic number, atomic mass and charge of atoms & ions. Define the atomic mass unit & average atomic mass. Calculate average atomic mass & isotopic abundance. Atomic . Mass Number. Where did that decimal come from?. Calculating Average Atomic Mass . I CAN . calculate the Average Atomic Mass Number of an element from its isotope data. .. The Case for a Decimal .

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