Some Important Atomic Terms

Which of the following is isoelectronic?

Set of isoelectronic species is

The ion that is isoelectronic with CO is

Which of the following sets of ions represent the collection of  isoelectronic species?

From the following pairs of ions which one is not an iso-electronic pair?

The number of protons, neutrons and electrons in ${}_{71}^{175}\mathrm{Lu}$, respectively, are

Among the following groupings which represents the collection of isoelectronic species?

Deuterium nucleus contains

Which of the following statements is wrong?

The electronic configuration of a dipositive metal ion ${\mathrm{M}}^{2+}$ is $2, 8, 14$ and its ionic weight is $58 \mathrm{a}.\mathrm{m}.\mathrm{u}.$. The number of neutrons in its nucleus would be _____.

 A transition metal $\text{'}\mathrm{X}$ has a configuration$\left[\mathrm{Ar}\right]3{\mathrm{d}}^5$ in its $+3$ oxidation state. Its atomic number is:-
 

In ${}_7{}^{14}\mathrm{N}$ if mass attributed to electrons were doubled and the mass attributed to protons were halved, the atomic mass would become approximately :-

An isotone of ${}_{32}{}^{76}\mathrm{Ge}$ is:
(i) ${}_{32}{}^{77}\mathrm{Ge}$
(ii) ${}_{33}{}^{77}\mathrm{As}$
(iii) ${}_{34}{}^{77}\mathrm{Se}$
(iv) ${}_{34}{}^{78}\mathrm{Se}$

Let mass of electron is half, mass of proton is two times and mass of neutron is three fourth of orignal masses, then new atomic weight of ${}^{16}\mathrm{O}$ atom:-

In an atom ${}_{13}{}^{27}\mathrm{Al}$, number of proton is ($\mathrm{a}$), electron is ($\mathrm{b}$) and neutron is ($\mathrm{c}$). Hence ratio will be [in order $\mathrm{c}:\mathrm{b}:\mathrm{a}$]:-

Atomic weight of $\mathrm{Ne}$ is $20.2$. $\mathrm{Ne}$ is mixture of ${}^{20}\mathrm{Ne}$ and ${}^{22}\mathrm{Ne}$, relative abundance of heavier isotope is:

If the table of atomic masses is established with the oxygen atom and assigned value of $200$ then the mass of carbon atom would be, approximately: