Question

'find the total negative or positive charge on a 2-g silver coin.the atomic number and atomic mass of silver is 47 and 107.9 resp.

Answer 1

Answer:

$\Rightarrow 8.39 \times 10^{4}\text{ C}$

Explanation:

Given that,

Atomic number of silver = 47

Atomic mass of silver = 107.9

We know that,

The atomic number is the number of the protons presents in an atom.

The atomic mass is the sum of the total number of proton and neutrons in the nucleus of the atom.

We know that,

In 107.9 g/m, present the number of protons is 47

So, In 2 gram Silver the number of positive charge present will be

$N_{p}=\dfrac{47}{107.9}\times2$

$N_{p}=0.871$  

In 107.9 g/p, present the number of electron is 47

So, In 2 gram Silver the number of negative charge present will be

$N_{e}=\dfrac{47}{107.9}\times2$

$N_{e}=0.871$

$1\text{ gram}=6.023\times 10^{23}\text{ atoms}$

$0.871\text{ gram}=5.23\times 10^{23}\text{ atoms}$

Charge of proton = $1.6\times 10^{-19}\ C$

$\Rightarrow 5.23\times 10^{23}\cdot 1.6\times 10^{-19}\text{ C}$

$\Rightarrow 8.39 \times 10^{4}\text{ C}$

Hence, The charge of electron or proton on 2-g of silver coin is $\Rightarrow 8.39 \times 10^{4}\text{ C}$