The number of electrons,protons and neutrons | vedclass

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Question

(A) The atomic number $(Z)$ is equal to the number of protons $= 16$. The element with atomic number $16$ is sulphur $(S)$.Atomic mass number $(A) =$

Vedclass · Accepted Answer

$_{16}^{32} S^{2-}$

Vedclass · Answer

(A) The atomic number $(Z)$ is equal to the number of protons $= 16$. The element with atomic number $16$ is sulphur $(S)$.Atomic mass number $(A) =$ number of protons $+$ number of neutrons $= 16 + 16 = 32$.The species is not neutral because the number of protons $(16)$ is not equal to the number of electrons $(18)$.Since the number of electrons is greater than the number of protons,it is an anion (negatively charged) with a charge equal to the excess electrons $= 18 - 16 = 2$.Therefore,the symbol is $_{16}^{32} S^{2-}$.

$(i) \ _{26}Fe^{54}, \ _{26}Fe^{56}, \ _{26}Fe^{58}$	$(a) \ \text{Isotopes}$
$(ii) \ _1H^3, \ _2He^3$	$(b) \ \text{Isotones}$
$(iii) \ _{32}Ge^{76}, \ _{33}As^{77}$	$(c) \ \text{Isoelectronic}$
$(iv) \ _{11}Na^+, \ _{12}Mg^{2+}$	$(d) \ \text{Isobars}$
$(v) \ _1H^1, \ _1D^2, \ _1T^3$

The number of electrons,protons and neutrons in a species are equal to $18$,$16$ and $16$ respectively. Assign the proper symbol to the species.

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