Mass Spectrometer and How to Find Atomic Mass

Feb 18, 2012

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Mass Spectrometer and How to Find Atomic Mass. It has several stages of operation that you must get familiar with (i.e. learn!): injection of the sample vaporization of the sample (if it's not already gaseous) ionization of the sample acceleration of the ions deflection of the ions

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Mass Spectrometer and How to Find Atomic Mass

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Mass Spectrometer and How to Find Atomic Mass

It has several stages of operation that you must get familiar with (i.e. learn!): • injection of the sample • vaporization of the sample (if it's not already gaseous) • ionization of the sample • acceleration of the ions • deflection of the ions • detection of the ions

The mass spectrum for boron Calculate the average atomic mass of B
Isotope % abundance

Atomic Mass

Atomic Mass. Atoms are so small, it is difficult to discuss how much they weigh in grams Use atomic mass units. an atomic mass unit (amu) is one twelfth the mass of a carbon-12 atom This gives us a basis for comparison The decimal numbers on the table are atomic masses in amu.

699 views • 36 slides

Mass Spectrometer

Mass Spectrometer. Mass spectrometere is a very powerful method to analyse the structure of organic compounds. Gas chromatographic – Mass spectrometer. How does a Mass Spectrometer work?. Separation in analyser according to mass-to-charge ratios (m/z) base on ionization

348 views • 7 slides

Mass spectrometer

Mass spectrometer. Use animation http://www.colby.edu/chemistry/OChem/DEMOS/MassSpec.html Watch the whole animation. Identify the fundamental principle of a mass spectrometer. Sketch a mass spectrometer in your green book. Identify the 5 main parts.

293 views • 4 slides

Atomic Mass

Atomic Mass. Atoms are so small, it is difficult to discuss how much they weigh in grams. Use atomic mass units. an atomic mass unit (amu) is one twelth the mass of a carbon-12 atom. The decimal numbers on the table are atomic masses in amu. They are not whole numbers .

773 views • 47 slides

The Mass Spectrometer

The Mass Spectrometer. Topic 2.2. Review of Topic 2.1. Mass Number (A) protons + neutrons. X. A. n+/n-. Charge (n) Atoms have no charge, so this is left blank. Ions are atoms that have gained or lost electrons, the charge is indicated here. Z. Atomic Number (Z) n umber of protons.

272 views • 15 slides

The Mass Spectrometer

The Mass Spectrometer. http://www.tcd.ie/CMA/equipment.php. Basic Theory. A moving object that encounters a sideways force will be deflected. What would you personally be able to deflect more, a cannonball or a tennis ball ? A) Cannonball B) tennis ball Deflection depends on the mass:

583 views • 28 slides

ATOMIC MASS & AVERAGE ATOMIC MASS

ATOMIC MASS & AVERAGE ATOMIC MASS. Overview: This tutorial discusses isotopes and isotopic abundance. Nuclear binding energy and mass defect are presented and the technique of mass spectrometry is introduced. .

533 views • 19 slides

Atomic Mass

Atomic Mass. Atomic Mass. The weighted average of all natural occurring isotopes of that element Example: Lithium = 6.941 amu Atomic number closest to 7, therefore most isotopes of lithium of a mass number of 7. Rubidium has two common isotopes, 85Rb and 87Rb. If the abundance of

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Atomic Mass, Mass Number

LECTURE: Atomic Mass/Mass Number Isotopes Radioactive Isotopes Mass Spectrometer Hydrogen Spectrum. Atomic Mass, Mass Number. The atomic mass number is the AVERAGE of all the isotopes of an element ( will be a decimal number )

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Atomic mass

Atomic mass. Mass number. Atomic number. ELECTRONS. Protons & Neutrons. Subatomic particles. Isotopes & Ions. ELECTRONS.

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The Mass Spectrometer

The Mass Spectrometer. 質譜儀. Isotope Separation Centrifuge and diffusion chamber. 同位素分離. 迴旋加速器 ( cyclotrons ). 迴旋頻率不因速率增加而改變，因此可用定頻交流電持續加速）. 同步加速器 ( synchrotrons). The resonance condition: When proton energy > 50Mev: Out of resonance (relativistic effect)

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Atomic Mass

Atomic Mass. Although it is possible to measure the actual mass of an atom, it is more convenient to use relative masses . The relative mass of an atom is a comparison of the atomâ€™s mass to the mass of a carbon-12 atom.

1.54k views • 10 slides

Atomic mass

Atomic mass. RELATIVE ATOMIC MASS, A r (“Mass number”) = number of protons + number of neutrons. 4. He. SYMBOL. 2. PROTON NUMBER = number of protons (obviously). Relative formula mass, M r. Relative atomic mass of O = 16. Relative atomic mass of H = 1.

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Atomic Mass

Atomic Mass. Atomic Number. Atoms are arranged on the periodic table in order of atomic number, or the number of protons. e. 2 protons. P. N. N. P. 2 protons + 2 neutrons. Ignore electrons. e. Atomic Number. Isotopes.

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Atomic Number, Mass Number, Atomic Mass and Isotopes

Atomic Number, Mass Number, Atomic Mass and Isotopes. is the number of protons in the nucleus of the atom. Z=#p + The number of protons (atomic number) determine the identity of an element. Atomic Number (Z):.

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Atomic Mass

Atomic Mass. What is an appropriate unit for measuring the mass of a single atom?. A Gram is much too large 1 Oxygen atom = 2.65x10 -23 g !! A new standard was chosen Atomic mass units (amu) 1.00amu = 1.66x10 -24 g. Atomic mass units .

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Atomic Mass

Atomic Mass. Standard mass unit is derived from carbon 12 Atomic mass unit – the mass equal to 1/12 the mass of one Carbon 12 atom. Atomic Mass. Experiments show that H is 8.400% less massive than carbon 0.084 x 12.00 amu = 1.008 amu. Average atomic mass.

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Atomic Number, Mass Number, Atomic Mass and Isotopes

Atomic Number, Mass Number, Atomic Mass and Isotopes. Mrs. Coyle Chemistry. Atomic Number (Z): is the number of protons in the nucleus of the atom. Z=#p. The number of protons (atomic number) determine the identity of an element. Atoms have no overall electrical charge so,

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ATOMIC MASS

ATOMIC MASS. amu = atomic mass unit If atomic mass is determined by the number of p + and e – , why isn’t it a whole number? Most elements occur as a mixture of two or more isotopes. ISOTOPES OF HYDROGEN. name. abundance. n 0. hydrogen-1. protium. 99.98%. 0. hydrogen-2. deuterium.

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Atomic Mass

Atomic Mass. Isotopes Reminder. Yesterday we learned that the mass of all atoms of a certain element are not always the same Some atoms may have more neutrons than protons We call these atoms isotopes. Atomic Mass. On your Periodic Tables, each element has its own atomic mass

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Atomic Mass

Atomic Mass. Atomic Mass – the mass of one atom of an element (unit: u) Ex. Carbon is 12.01 u; Hydrogen is 1.01 u. The Mole. A mole is 6.02 x 10 23 entities (atoms or molecules) of something (element or compound). The number 6.02 x 10 23 is known as Avogadro’s constant (N A ).

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Mass Spectrometer

Mass Spectrometer. Used to identify atoms and their concentrations in a sample of material. Between S1 and S2, molecules go straight if q E = q v B or v = E/B After S2, B produces circular motion q v B’ = m v 2 /r m = q B’ r/v = q B B’ r/E Found isotopes. E8 – Topics to cover.

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Mass Spectrometer and How to Find Atomic Mass

Mass Spectrometer and How to Find Atomic Mass

Presentation Transcript

Atomic Mass

Mass Spectrometer

Mass spectrometer

Atomic Mass

The Mass Spectrometer

The Mass Spectrometer

ATOMIC MASS &amp; AVERAGE ATOMIC MASS

Atomic Mass

Atomic Mass, Mass Number

Atomic mass

The Mass Spectrometer

Atomic Mass

Atomic mass

Atomic Mass

Atomic Number, Mass Number, Atomic Mass and Isotopes

Atomic Mass

Atomic Mass

Atomic Number, Mass Number, Atomic Mass and Isotopes

ATOMIC MASS

Atomic Mass

Atomic Mass

Mass Spectrometer

ATOMIC MASS & AVERAGE ATOMIC MASS