DNA molecule EXAMPLE: CARBON AND ITS ISOTOPES CHEMICAL ELEMENTS & ISOTOPES CARBON = C (COAL, DIAMOND) C-22 6P+16N T½=9ms M=22.056 C-9 6P+3N T½=127ms M=9.031.

Slides:

Advertisements

Similar presentations

Elements - Names and Symbols n Hydrogen nHnH n Helium n He n Lithium n Li.

Advertisements

Lecture 1.1 Refresh your high school chemistry CS882, Fall 2006.

Suzanne D'Anna1 Composition of Matter. Suzanne D'Anna2 Composition of Matter l all matter is composed of ELEMENTS l elements cannot be decomposed or broken.

Sodium (Na) - 11 Atomic Number = - - Atomic Mass = neutrons

NAMING COMPOUNDS CH We use the word, COMPOUND, when describing an ionic bonded molecule. An example: –NaCl is sodium chloride.

Hydrogen H Zinc Zn Chlorine Cl Copper Cu Helium He.

Periodic Table of the Elements Written by: Bill Byles -

Review of Elements and Symbols. P Phosphorous Ag Silver Cu Copper N Nitrogen.

Flashcard Elements Sodium Na Potassium K Fluorine F.

SULFUR S. IODINE I BARIUM Ba BORON B BISMUTH Bi.

H. Hydrogen O OXYGEN Al Aluminum Kr Krypton.

Atoms and Elements. Atoms Atoms are the “building blocks” of all matter and are the simplest form of molecule. They are all made up of protons, neutrons.

Alkali Metals Nobel Gases Halides Non Metals

Periodic Table of Elements. Element An element is a substance that is made up of ONE kind of atom only. e.g. Carbon.

The Chemical Context of Life

Chapter 2 Notes The Chemical Context of Life. Concept 2.1 Organisms are composed of matter: anything that takes up space or has mass Element: a substance.

08/09/2015 Starter - Elements and symbols that you should know: Part 1 – The obvious ones: 1)Hydrogen 2)Helium 3)Lithium 4)Beryllium 5)Boron 6)Carbon 7)Nitrogen.

PRACTICE DRAWING ATOMS. DRAWING ATOMS RULES PROTONS = Atomic number ELECTRONS = Atomic number NEUTRONS = mass number – atomic number 1 st level can hold.

1. Atoms Elements Compounds 2. The structure of an Atom 3. Symbols for elements 4 Elements of the periodic table Chemistry Elements Chemistry Elements.

Element Symbol Practice. Carbon C Potassium K Beryllium Be.

Elements and Symbols Practice. PART I (SLIDES WITH BLUE BACKGROUNDS) Directions: Name the Symbol for each listed element.

Atomic Structure. Rules Of Atomic Structure 1.The Number of electrons = number of protons 2.Atomic Number = the number of protons/electrons 3.Atomic Mass.

18 Bohr Models Lesson 3.1 Extension. Element Name: _______________________ Chemical Symbol: _______Atomic Number: _______ Diagram the Bohr atom which.

Periodic Table of the Elements. Select an element = Internet link ()

hydrogen atom 1 atomic number so one electron 1 H X.

Valence Electrons and Oxidation Numbers Chemistry Dr. May.

Name That Element 1 Created by T.Trimpe 2008

Symbol Review ? ? ? ? ? ? ?.

Naming Compounds, cations and anions. Elements and symbols that you should know: Part 1 – The obvious ones: 1)Hydrogen 2)Helium 3)Lithium 4)Beryllium.

CL CL Mg CL CL CL CL CL CL CL CL CL CL O C O.

Review of Elements #1-20 Good Luck!! FabulousFunFriskyDr. Evil

Put a different element name on each card, along with its symbol, number of protons and number of electrons. Metals on 1 colour, others on other What makes.

Periodic Table, Atoms, and Isotopes Review. Directions  Use these questions to help you to review and guide your study.

General Informations Name of the teacher : Jennifer. M. Job Subject :Chemistry Topic : Mendeleev’s periodic law, Moseley’s periodic law and Modern periodic.

CHAPTER 2 The Chemical Context of Life. 2.1 Matter is made of elements and compounds.  Organisms are composed of matter - anything that takes up space.

La Tabla Periodica Cada elemento Y su explicacion.

Cosmic Code Book Periodic Table of ELEMENTS aluminum Al aluminum.

Name That Element Extra Credit Created by T.Trimpe 2008.

1s 2s 2p 3s 3p 3d 4s Electronic configuration: FeMnVTiScK Na ZnCuNiCrCo Mg Ca Be H As O S Se F Cl BrGa C Si Ge N P He 1s 1 Ne Ar Kr Hydrogen 1 2 GROUP.

Study of Elements All Elements. Chromium Cr Hydrogen H.

The Bohr Model Mr. Matthew Totaro Legacy High School Chemistry.

What is the chemical symbol of Hydrogen? H. What is the chemical symbol of Carbon? C.

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com O Oxygen Atomic # 8 Atomic Mass 16 8 Protons 8 Neutrons 8 Electrons O

Interpreting the Periodic Table H He LiBeBCNOFNe NaMg KCa AlSiPSClAr

Theories of the Atom. Ernest Rutherford (Gold Foil Experiment) Discovered that atoms have a positively charged central mass called the nucleus Hypothesis:

Using the Main Group Elements of the Periodic Table to Draw Bohr-Rutherford Diagrams He

CHEMICAL INTERACTIONS Ch 1.1 Atoms are the smallest forms of elements.

Atomic Structure. It used to be thought that atoms were small indivisible particles. It was thought that the only difference between the atoms of one.

First 20 Elements in the Periodic Table

57 Elements Test Review. Hydrogen H Lithium Li.

Hydrogen H 1 1 Atomic number = 1 Mass number = 1

ATOMIC STRUCTURE S.MORRIS 2006.

Elements and Compounds

Atomic Mass = All the Isotopes

WARM UP “Nothing is particularly hard if you break it into small jobs.” –Henry Ford What does this mean to you? How can you apply this to memorizing all.

(1st to finish gets extra credit)

19/09/2018 Atoms and Elements W Richards Worthing High School.

19/09/2018 Atoms and Elements.

19/09/2018 Atoms and Elements.

The Atom Grade 9 Science Ms. Raper..

20/09/2018 Atoms and Elements W Richards The Weald School.

Periodic Table Element flashcards

H stands for the hydrogen atom He is helium Li is lithium

Elements numbers 1-20.

The Chemical Context of Life

13/04/2019 Atoms and Elements W Richards The Weald School.

17/05/2019 Atoms and Elements W Richards Worthing High School.

Presentation transcript:

DNA molecule EXAMPLE: CARBON AND ITS ISOTOPES CHEMICAL ELEMENTS & ISOTOPES CARBON = C (COAL, DIAMOND) C-22 6P+16N T½=9ms M= C-9 6P+3N T½=127ms M=9.031 C-11 6P+5N T½=20min M= C-14 6P+8N T½=5715y (from N-14 + n) (~4kBq in 70kg man, none in coal) M= C-18 6P+12N T½=0.09s M= C-12 6P+6N STABLE – 18% of body mass M= C-12 6P+6N STABLE – 18% of body mass M= C-13 6P+7N STABLE – 1.1% of C M= C-15 6P+9N T½=2.45s M= Question : Where does nuclear energy come from ? Clue : E = mc 2 Answer : The slight excess of mass of the less stable isotopes is converted to energy when isotopes are converted from less stable to more stable ones.

CARBON ISOTOPES BORON ISOTOPES NITROGEN ISOTOPES CARBON ISOTOPES BORON NITROGEN CARBON OXYGEN BERYLLIUM BORON NITROGEN CARBON OXYGEN BERYLLIUM LITHIUM HELIUM HYDROGEN neutron FLUORINE NEON BORON NITROGEN CARBON OXYGEN BERYLLIUM LITHIUM HELIUM HYDROGEN neutron FLUORINE NEON SODIUM MAGNESIUM ALUMINIUM SILICON PHOSPHORUS SULFUR CHLORINE ARGON POTASSIUM CALCIUM ALSO CALLED “CHART OF THE NUCLIDES” TABLE OF ISOTOPES CARBON - 12

H He Li Be B C F O N Si Al Mg Na Ne Cl S P Ar Ca K ALSO CALLED “CHART OF THE NUCLIDES” TABLE OF ISOTOPES Mg-35 (T½=0.07 sec) Na-35 (T½=1.5 msec) Al-35 (T½=0.03 sec) Si-35 (T½=0.9 sec) P-35 (T½=47 sec) S-35 (T½=87.2 d) Cl-35 (stable) Question : What is more radioactive ? A) an isotope with a long half-life ? or B) an isotope with a short half-life ? (assume you have 1 kg of each) Clue # 1: Think of nuclear radiation as a form of light (high energy form of light) Clue # 2: Think of radioactive isotopes as a store of energy (like an electric battery)

Clue # 3 Little radiation for weeks Powerful radiation for…. ….one minute ? Identical car batteries – both charged to full Answer : The isotope with a short half-life is more radioactive because all its energy is radiated away quickly !!

CHART OF THE NUCLIDES – EXCESS MASS CHEMICAL ELEMENTS & ISOTOPES RADIOACTIVE DECAY “VALLEY OF STABILITY” Na-35 (T½=1.5 msec) Cl-35 (stable) Skip next

H He Li Be B C F O N Si Al Mg Na Ne Cl S P Ar Ca K ALSO CALLED “CHART OF THE NUCLIDES” TABLE OF ISOTOPES URANIUM-235 ( U-235 ) comprises 0.71% of natural uranium (99.28% U-238) (0.006% U-234) Example : U n°  Y-96 + I n° (Uranium 235) (Yittrium 96) (Iodine 138) C-12 IRON-56 ( Fe-56 ) Ba-138 (stable) Cs-138 (T½=32.2 min) Xe-138 (T½=14.1 min) I-138 (T½=6.5 sec) Mo-96 (stable) Nb-96 (T½=23.4 hr) Zr-96 (T½=2x10 19 y) Y-96 (T½=6.2 sec)

CHART OF THE NUCLIDES – EXCESS MASS TABLE OF ISOTOPES IN 3-D U-235 U n°  Y-96 + I n° (Uranium 235) (Yittrium 96) (Iodine 138) I-138 (T½=6.5 sec) Y-96 (T½=6.2 sec) Mo-96 (stable) Ba-138 (stable)