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10 Cards in this Set
- Front
- Back
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Name the three types of particle in an atom. State the relative mass and charge of each particle.
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>Proton - mass 1, charge +1
>Neutron - mass 1, charge 0 >Electron - mass 1/1840, -1 |
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How are the particles in an atom arranged?
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Protons and neutrons in central nucleus held by strong nuclear force. Electrons orbit nucleus in shells (electrostatic force).
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How many electrons do the first shells hold?
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2n squared / n = number of shell
1st = 2 2nd = 8 3rd = 18 |
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Write the shorthand for 9 electrons.
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2,7,
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Draw the electron arrangement diagram of an atom with 16 electrons.
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Define the term mass number, A.
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The sum of the protons and neutrons in the nucleus of an atom.
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Define the term atomic number, Z.
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The number of protons in the nucleus of an atom.
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Define the term Isotope.
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Atoms with the same number of protons but different numbers of neutrons.
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Why do isotopes of the same element have identical chemical properties?
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They have the same number and arrangement of electrons.
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What does a mass spectrometer measure?
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Relative atomic masses
Relative molecular masses |
