Chem-805 Identification of organic and inorganic compounds by spectroscopy. Mass Spectrometry NMR Infrared. Mass Spectrometry. Simplest form of mass spectrometer performs 4 essential functions: (under vacuum 10 -6 mm Hg).
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Elements and the Periodic Table. Classification is arranging items into groups or categories according to some criteria. The act of classifying creates a pattern that helps you recognize and understand the behavior of fish, chemicals, or any matter in your surroundings. Classifying Matter.
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Proton A nuclear particle having a positive charge equal to that of the electron and a mass more than 1800 times that of the electron The number of protons in an atom is called the atomic number, Z.
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Nuclear Chemistry. Chapter 21. Review Chapter 3. Z = Atomic Number Atomic Number is the number of _______ . Mass Number Number of _______ + ________ Average Atomic mass Weighted average of mass numbers of isotopes What is an isotope? Why are electrons not included in the mass number?.
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ATOMS. A SELF-GUIDED COMPUTER ACTIVITY. Welcome to Atoms. This is a Self-Guided lesson on Atoms . In this computer activity you will be creating your own Study Guide . Feel free to complete this lesson at your own pace. Please follow all instructions carefully.
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?. ?. What do atoms look like?. ?. ?. What do we know about atoms?. *All elements are composed of atoms *The atoms of the same element are the same (and different from the atoms of any other element)
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Phosphorescent materials continue to glow after the lights are turned off. How can you use the model of an atom to explain this?. Structure and Properties of the Nucleus. Nucleons. Proton is the nucleus of the simplest atom, hydrogen. It has positive charge (+e) and mass m p =1.6726x10 -27 kg.
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Chapter 4: Atomic Structure. Subatomic Particles Symbol Notation Isotopes Average Atomic Mass. Democritus. Atom : smallest part of an element that retains the identity of that element.
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SL Chemistry. Tuesday September 22nd 2015. Agenda. Begin Topic 2 - Atomic Structure. Atoms contain a positively charged dense nucleus composed of protons and neutrons (nucleons). Negatively charged electrons occupy the space outside the nucleus.
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ISOTOPES. Topic #7. Isotopes. Dalton was wrong about all elements of the same type being identical Atoms of the same element can have different mass numbers. Shoulder Partners. How can atoms of the same element end up with a different mass?. Isotopes.
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