Answer:
your answer will be A hope ur help and mark me brainlist
Answer:
4060
Explanation:
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An isotope of Aluminium, a 'normal' Al atom would have a proton number of 13 (as this does not change in isotopes of the same element) but only 14 neutrons. This isotope of Al has 1 extra neutron than regular Al.
The elements are listed in order of increasing the atomic number. Its the number that is the number of protons in the nucleus of an atom.