Chemistry Topic 2A

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Proton

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Symbol: p

Relative mass : 1

+1 charge at the nucleus

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Neutron

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Symbol : n

Relative mass : 1

0 at nucleus

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9 Terms

1
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Proton

Symbol: p

Relative mass : 1

+1 charge at the nucleus

2
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Neutron

Symbol : n

Relative mass : 1

0 at nucleus

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Electron

Symbol : e-

Relative mass : 1/1840

-1 energy levels surrounding the nucleus

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Atomic number definition ?

Number of protons ( electrons )

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Mass number definition ?

Number of neutrons and protons.

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Isotope definition ?

An atom of an element that has a different number of neutrons.

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Relative atomic masses definition ?

The weighted mean mass of an atom in a mixture of isotopes.

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Relative isotopic mass definition ?

The mass of a single isotope.

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What is a mass spectrometer ?

A mass spectrometer measures the mass of atoms and molecules. It produces positive ions that are then deflected based on their mass-to-charge ratio(m/z).