Shikha Goel and Saleha Parvez Solutions for Chapter: Atomic Structure and Chemical Bonding, Exercise 7: CHALLENGERS*

Consider the following information.

Ramana wants to neutralise it but the available particles with her are neutron, electron, proton and helium nuclei. Which will be the best item to fulfill the Ramana's need?

Which of the following will not show deflection from the path on passing through an electric field?

Which of the following ion has the maximum shells containing electrons?

Which of the following figures do not represent Bohr's model of an atom correctly?

An element X is converted into its positive ion as $\mathrm{X} \to {\mathrm{X}}^{3+}$. Mass number of the atom is $27$and the number of neutrons is $14$. What is the number of electrons in the ion?

An element $\mathrm{X}$ has two isotopes, which may be represented as ${}^{238}\mathrm{X}$ and ${}^{235}\mathrm{X}$.

How does ${}^{238}\mathrm{X}$  differ from ${}^{235}\mathrm{X}$?

Elements $\mathrm{A}, \mathrm{B} \mathrm{and} \mathrm{C}$ have respectively $1, 3$ and $5$ electrons in valence shell. Ionic compound is not formed from 

Multiple covalent bond exists in a molecule of