Size and Mass of Atoms (4.1.1.5)
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9 Terms
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Radius
Atoms are very small, having a __ of about 0.1 nano-meter (1 x 10-10 m)
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1/10 000
The radius of a nucleus is less than __ of that of the atom
(about 1 x 10-14 m).
(about 1 x 10-14 m).
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The nucleus
Almost all of the mass of an atom is in...
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1
Proton (relative mass)
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1
Neutron (relative mass)
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Very small
Electron (relative mass)
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Mass number
The sum of the protons and neutrons in an atom is its...
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Isotopes
Atoms of the same element can have different numbers of
neutrons are called
neutrons are called
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Different
Atoms of the same element can have __ numbers of
neutrons are called Isotopes
neutrons are called Isotopes
Note 
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