Number of unpaired electrons in ${\mathrm{N}}^{2+}$ is

Important Questions on Structure of Atom

MEDIUM

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

The electronic configuration which obeys Hund's rule for the ground state of carbon atom is

MEDIUM

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

$Gd\left(64\right)$ has __ unpaired electrons with sum of its spin as  __.

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

The maximum number of electrons that can be filled in the shell with the principal quantum number $\mathrm{n}=4$ is

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

The total number of orbitals associated with the principal quantum number $5$ is:

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

The element with $\mathrm{Z}=120$ (not yet discovered) will be a/an

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

Aqueous solution of which of the following salts will not contain ions with the electronic configuration $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^6$ ?

MEDIUM

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

Which statement is incorrect for the periodic classification of elements?

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

The orbital nearest to the nucleus is

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

How many electrons can fit in each orbital for which $\mathrm{n}=3$ and $\mathrm{l}=1$?

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

The number of valence electrons in an atom with electronic configuration $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^3$ is

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

The group number, number of valence electrons, and valency of an element with atomic number $15,$ respectively, are:

MEDIUM

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

If the principal quantum number $\text{n}=6,$ the correct sequence of filling of electrons will be:

MEDIUM

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

$4\mathrm{d},\mathrm{ }5\mathrm{p},\mathrm{ }5\mathrm{f}$ and $6\mathrm{p}$ orbitals are arranged in the order of decreasing energy. The correct option is:

MEDIUM

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

Which one of the following statements is wrong?

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

The number of unpaired electrons in ${\mathrm{Ni}}^{2+}$ (atomic number $=28$ ) are

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

Which of the following electron is most tightly bound to the nucleus?

MEDIUM

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

Energy associated with the first orbit of ${\mathrm{He}}^{+}$ is

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

The element which readily forms an ionic bond has the electronic configuration

MEDIUM

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

The number of $\mathrm{d}$-electrons in ${\mathrm{Fe}}^{2+} (\mathrm{Z}=26)$ is not equal to the number of electrons in which one of the following?

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

Which is the correct order of increasing energy of the listed orbitals in the atom of titanium?

(At. No. Z = $22$)