Question

The charge of an electron is $$-1.6X{10}^{-19}C.$$ The value of charge on the $L{i}^{+}$ ion will be
$3.6X{10}^{-29}$
$1X{10}^{-29}$
$1.6X{10}^{-19}$
$2.6X{10}^{-29}$

Answer 1

Hint: One way to solve this question is to find the formal charge on the lithium ion and then calculate the value of charge on the lithium ion. The charge on an electron in coulombs is the negative of $$1.6X{10}^{-19}C.$$

Complete step by step solution:
Given in the question:
Charge on the electron = $$-1.6X{10}^{-19}C.$$
We have to find the charge on lithium ion
Now to calculate the charge on $L{i}^{+}$ ion we have to calculate the value of free charge on $L{i}^{+}$ ion or the value of the formal charge on the $L{i}^{+}$ ion.
We can calculate the formal charge on an ion by using the formula= $V-B-{\displaystyle \frac{N}{2}}$
Where V = valence electrons in a free atom i.e. the number of electrons present in the valence shell of an atom in Free State.
B = number of electrons shared in the covalent bond i.e. if there is formation of covalent bond then we will write down the electrons shared in the covalent bond.
N = number of electrons in a lone pair i.e. the electrons which do not participate in formation of bond
In the case of $L{i}^{+}$ ion the value of
V = valence electron in free atom = 1
B = number of electrons shared in the covalent bond = 0
N = number of electrons in a lone pair= 0
After putting all the value in above equation we get
The new formal charge on the $L{i}^{+}$ ion = 1
The charge on lithium ion = $1.6X{10}^{-19}$

Hence the correct answer is option (C).

Note: Electrons is a subatomic particle whose electric charge is negative. All the electrons in an atom creates the total negative charge that balances the total positive charge on the atom.