ascertain negative ion X^-2has in its nucleus 18 neutrons and 18 electrons in its extranuclear structure what is the mass number of the most abundant isotope of x
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40
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Answer:
32
Explanation:
X −2 has 18e −
this means that 'x' has gained 2e −
hence 'X' has 16e −
which implies x has 16 protons
mass number = no. of neutrons + no. of protons
=18+16=34
atomic number (Z)= no. of protons =16
implies element is Sulphur
Using the periodic table, we can say that both
16 S 34 & 16 S 32 exist.
As 16 S 32 is present in high proportion in earth crust,
so we can say that 16 S 32 is the most abundant isotope.
HOPE YOU UNDERSTAND IT!!!!
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