Isobars are atoms with

  • A
    Same mass number and same atomic number
  • B
    Same atomic number and different mass number
  • C
    Same mass number and different atomic number
  • D
    Different atomic number and different mass number

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Which of the following pairs are isoelectronic with one another?

The number of protons,neutrons and electrons in the ion ${ }_{16}^{32} S^{2-}$ respectively are

$A$ monoatomic anion $(A^-)$ has $45$ neutrons and $36$ electrons. The atomic mass, group in the periodic table, and physical state at room temperature of the element $(A)$ are respectively:

Number of neutrons in ${}^{12}C$ is

The mass number of an anion,$X^{3-}$,is $14$. If there are $10$ electrons in the anion,the number of neutrons in the nucleus of an atom of the element $X$ is:

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