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|−|An isotope is an [[ atom| atom]] of the same element with a different number of [[ neutron| neutrons]] in the [[ nucleus| nucleus]]. Some common isotopes are [[ carbon| carbon]] 13, [[ chlorine|chlorine]] 35 and [[chlorine|chlorine]] 37. Also an isotope contains the same number of [[Proton|protons]] in the [[nucleus|nucleus]], therefore meaning its [[Atomic_number|atomic number]] is the same. But on the other hand its mass number is different. |+|
[[|]]the same number of [[|]] [[|]].Some common isotopes are [[|]] ,[[|chlorine]] 35 and 37 .
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Revision as of 16:43, 25 October 2017
Isotope are atoms containing the same number of protons and electrons but different number of neutrons. Some common isotopes are chlorine 35 , chlorine 37 and Hydrogen:-1,2 and 3.
Chlorines average mass is calculated ;
Cl 35 has 75% and cl 37 has 25% of it's mass.
Chlorines Ar of 35.5, which is calculated by (75 x 35) + (25 x37)/100 = 35.3