2. In atom A how many electrons are there? Ion D? Ion E?

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Presentation transcript:

2. In atom A how many electrons are there? Ion D? Ion E? 1. In atom A how many protons are there? Ion D? Ion E? 2. In atom A how many electrons are there? Ion D? Ion E? 3. How are the 3 diagrams the same? 4. How are they different? 5. One diagram is listed as an atom; the other two are listed as ions. What makes an ion different from an atom? 6. How does the atomic mass change when an atom becomes an ion?

Building on the Atom: Ions Thursday, September 17th, 2015

Ion – an atom that has gained or lost electrons Cation - positive charge - Ion that has lost an electron (e-) Anion - negative charge - Ion that has gained an electron (e-) # protons does not = # electrons

Ion – an atom that has gained or lost electrons

Atomic Symbol vs. Ion Symbol Oxygen vs. Oxygen (-2) O O-2 Sodium vs. Sodium (+1) Na Na+ Zinc vs. Zinc (2+) Zn Zn2+

15 30.974 16 18 56 137.33 81 54 Phosphorous (-3) Barium (+2) Atomic # Examples: Atomic # Atomic Mass p+ n0 e- Phosphorous (-3) 15 30.974 16 18 Barium (+2) 56 137.33 81 54 Complete the Ion Table + put it in your notebook

same element different masses Isotope - Variation of a type of atom All isotopes of an atom have the same # protons Each isotope of an atom has different mass Therefore, Each isotope has a different mass # Each isotope has a different # neutrons same element different masses

Isotope Hydrogen-1 Hydrogen-2 Hydrogen-3 Atomic Number 1 Mass Number 3 # protons # neutrons # electrons Nuclear Symbol

Examples: Atomic # Mass #p #n #e Nitrogen-12 Nitrogen-14 Sulfur-30

Complete "An Investigation into Isotopes" Examples: Atomic # Mass #p #n #e Nitrogen-12 7 12 5 Nitrogen-14 14 Sulfur-30 16 30 Sulfur-32 32 Complete "An Investigation into Isotopes"