Some Important Atomic Terms

Which of the following is isoelectronic?

Set of isoelectronic species is

The ion that is isoelectronic with CO is

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

Consider a hypothetical case in which the charge of a proton is twice as that of an electron. Using this hypothetical case, how many protons $\left(\mathrm{P}\right),$ neutrons $\left(\mathrm{N}\right)$ and electrons $\left(\mathrm{E}\right)$ would a neutral ${}^{23}\mathrm{Na}$ atom contain?

$\mathrm{B}{\mathrm{e}}^{2+}$ is isoelectronic with which of the following ions?

$\mathrm{B}{\mathrm{e}}^{2+}$ is isoelectronic with which of the following ions?

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

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 _____.

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) ${}_{34}{}^{78}\mathrm{Se}$

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:

Choose the false statement about deuterium:-