Atomic mass

Aug 09, 2014

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

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Atomic mass

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

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.

725 views • 36 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 .

805 views • 47 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. .

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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

260 views • 4 slides

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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Average Atomic Mass

Average Atomic Mass. Chemistry Notes. Relative Atomic Mass. Masses of atoms expressed in grams are very small, for example: One atom of Oxygen-16 has a mass of 2.66x10 -23 g = 0.0000000000000000000000266g The standard used to denote units of atomic mass is the carbon-12 nuclide.

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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.

1.76k 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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Average Atomic Mass

Average Atomic Mass. What is average atomic mass? Average atomic mass is the weighted average of the atomic masses of the naturally occurring isotopes of an element. Calculating a Weighted Average. Example A box contains two size of marbles. If 25.0% have masses of 2.00 g and 75.0%

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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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Average Atomic Mass

Average Atomic Mass. AAM. Weighted average of all the known isotopes of an element In order to find the AAM you need the % and mass for each isotope. Find the average atomic mass of the following element: 234 U (0.01%), 235 U(0.71%), 238 U(99.28%).

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Average Atomic Mass

Average Atomic Mass. Average Atomic Mass. atomic masses reported in periodic table represent: weighted average of masses of all naturally occurring isotopes of an element. Weighted Average:Test Grades. suppose have : 1 test of 0% and 9 tests of 90%

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Average Atomic Mass

Average Atomic Mass. Average Atomic Mass. atomic masses reported in periodic table represent: weighted average of masses of naturally occurring isotopes of an element. Weighted Average:Test Grades. Suppose have : 1 test of 0% and 9 tests of 90%

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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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3.1 Atomic Mass

3.1 Atomic Mass. The mass of an atom is so small that the smallest speck of dust that our unaided eyes can detect contains as many as 1 X 10 ^16 atoms. An atom is made up of three subatomic particles: protons, neutrons, and electrons

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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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Average Atomic Mass

Average Atomic Mass. Average Atomic Mass – the weighted average of the masses of the isotopes of an element. Every element is composed of several naturally occurring isotopes of that element-each with its own atomic mass

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Atomic mass

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Presentation Transcript

Atomic Mass

Atomic Mass

ATOMIC MASS &amp; AVERAGE ATOMIC MASS

Atomic Mass

Atomic Mass, Mass Number

Average Atomic Mass

Atomic Mass

Atomic mass

Atomic Mass

Average Atomic Mass

Atomic Number, Mass Number, Atomic Mass and Isotopes

Average Atomic Mass

Average Atomic Mass

Average Atomic Mass

Atomic Mass

3.1 Atomic Mass

Atomic Mass

Atomic Number, Mass Number, Atomic Mass and Isotopes

ATOMIC MASS

Atomic Mass

Atomic Mass

Average Atomic Mass

ATOMIC MASS & AVERAGE ATOMIC MASS