How many valence electrons present in ${Cl}^{-}$ ion?

50% studentsanswered this correctly

Important Questions on Structure of The Atom

MEDIUM

Science>Chemistry>Structure of The Atom>Distribution of Electrons in Different Orbits (Shells)

Which will have electronic configuration

2, 8, 2

EASY

Science>Chemistry>Structure of The Atom>Distribution of Electrons in Different Orbits (Shells)

Hydrogen contains three types of atoms (

{}_{1}^{1}H

protium,

{}_{1}^{2}H

deuterium,

{}_{1}^{3}H

tritium). These atoms are

MEDIUM

Science>Chemistry>Structure of The Atom>Distribution of Electrons in Different Orbits (Shells)

Which element have two shells and both these shells are fulfilled with electrons?

MEDIUM

Science>Chemistry>Structure of The Atom>Distribution of Electrons in Different Orbits (Shells)

Two elements P and Q have

5

and

7

electrons in their outermost shell respectively. The atomic number of P and Q will be

MEDIUM

Science>Chemistry>Structure of The Atom>Distribution of Electrons in Different Orbits (Shells)

An atom has electronic configuration 2, 8. 7. What is the atomic number of this element.

MEDIUM

Science>Chemistry>Structure of The Atom>Distribution of Electrons in Different Orbits (Shells)

Two atoms are said to be isobars if

MEDIUM

Science>Chemistry>Structure of The Atom>Distribution of Electrons in Different Orbits (Shells)

Match the following :
List -I :
(a) Frequency of distribution of the emitted radiation from a black body
(b) Spin quantum numbers(m_s)
(c) Angular Momentum
(d) All orbital have equal energy

List - II :
(i) degeneracy
(ii) temperature dependent
(iii) vector quantity
(iv) mass times velocity times radius

Codes:

EASY

Science>Chemistry>Structure of The Atom>Distribution of Electrons in Different Orbits (Shells)

Radioactive isotope used in the treatment of cancer disease is

HARD

Science>Chemistry>Structure of The Atom>Distribution of Electrons in Different Orbits (Shells)

Nitrogen (atomic number $7$ ) and phosphorus (atomic number $15$ ) belong to group $15$ of the Periodic Table. Write the electronic configuration of these two elements. Which one of these will be more electronegative? Why?

EASY

Science>Chemistry>Structure of The Atom>Distribution of Electrons in Different Orbits (Shells)