Fund. B - Atoms, Elements & the Periodic Table

Fund. B - Atoms, Elements & the Periodic Table -...

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Fundamentals B: Elements, Atoms & The Periodic Table B.1 – Atoms 1. All atoms of a given element are identical 2. The atoms of different elements have different masses 3. A compound is a specific combination of atoms of more than one element 4. In a chemical reaction atoms are neither created or destroyed – they exchange partners to produce new substances B.2 & B.3 – The Nuclear Model Subatomic particles – atoms are made up of: Protons: Z= the number of protons in a nucleus (atomic number) Neutrons Electrons B.4 – Isotopes A= protons + neutrons (atomic mass number) If an element has different numbers of neutrons it is an isotope Z will be the same & A will be change 12 C: Z = 6 A = 12 (6 protons and 6 neutrons) 13 C: Z = 6 A = 13 (6 protons and 7 neutrons) If the atomic mass of 13 C is a total of 13 protons and neutrons why can’t it be 7 protons and 6 neutrons? It would not be carbon – an atoms with 7 protons is nitrogen!!!! B.5 – Periodic Table
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Fund. B - Atoms, Elements & the Periodic Table -...

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