1 / 15

Ions and Isotopes

Ions and Isotopes. Objective Students will be able to: use atomic symbols to represent different atoms and their isotopes. Identify and define ions of different elements. Some definitions. Ion - an atom that has a positive or negative charge.

ravi
Download Presentation

Ions and Isotopes

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Ions and Isotopes Objective Students will be able to: use atomic symbols to represent different atoms and their isotopes. Identify and define ions of different elements

  2. Some definitions • Ion - an atom that has a positive or negative charge How does something have a positive or negative charge? Number of protons and electrons has to be different!

  3. How can an atom become an ion? • By gaining or losing electrons Losing Electrons= CATION Gaining Electrons= ANION

  4. Cation • Positive charge • Formed by the atom losing electrons A neutral atom of sodium loses an electron and becomes Na+1 How many electrons does Li+1 have? Mg+2?

  5. Anion • Negative charge • Formed by the atom gainingelectrons Chlorine gains one electron and becomes Cl-1 How many electrons does Br-2 have? F-1??

  6. Why do atoms become ions? • Atoms want to have a full outer shell (orbital) • one electron in outer shell will lose the electron. • all but one electron will gain one. Which is likely to become a cation? Which is likely to become an anion?

  7. Summary of Ions • Loseelectrons- become positive, which is a cation • Gainelectrons- become negative, which is an anion • Electrons are gained or lost in the outermost shell • These are called valence electrons

  8. Atomic Notation Mass number= protons + neutron Element Symbol Atomic number= Protons P= N= E= 7 7 7 20 20 20 P= N= E=

  9. Atom Builder game

  10. Isotopes • Isotopesare atoms of the same element that have different numbers of neutrons. • The mass number of an isotope tells you the number of protons plus the number of neutrons. Difference? Similarities? http://web.visionlearning.com/custom/chemistry/animations/CHE1.3-an-isotopes.shtml H-1 H-2 H-3

  11. Learning Check Naturally occurring carbon consists of three isotopes, 12C, 13C, and 14C. State the number of protons, neutrons, and electrons in each of these carbon atoms. 12C 13C 14C 6 6 6 #p _______ _______ _______ #n _______ _______ _______ #e _______ _______ _______

  12. Solution 12C 13C 14C 6 6 6 #p 6 6 6 #n 6 7 8 #e 6 6 6

  13. Heavy WaterApplication of isotope • Duterium- 21H can bind with oxygen • Only occurs 1 in every 3200 molecules • Concentrated heavy water is used for development of nuclear weapons • Can be poisonous to plants and animals.

  14. Cobalt-60Application of isotope • Has one extra neutron in the nucleus • Radioactive and emits gamma radiation, which can pass through materials easily • Sterilizes medical equipment and kills harmful bacteria

More Related