The atomic number of lithium is 3. How many neutrons does an atom of lithium have if it is represented by the symbol shown below
2 answers:
Answer:
Lithium has 4 neutrons
Explanation:
The number shown above the lithium symbol (Li) is the mass number.
The mass number (A) represents the protons and neutrons an atom has.
The atomic number(Z) in the other hand represents the protons only.
So, the difference between this two numbers is the amount of neutrons.
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Moles of electrons:
The moles of electrons that are transferred are 12F
A balanced equation:
2 moles of Aluminium metal react with excess copper(II) nitrate.
Given:
Moles of Aluminium = 2
As Aluminium goes from 0 to +3 oxidation state
And copper goes from +2 to 0
On balancing the number of electrons we get:
For 1 mole of Al is required.
Therefore for 2 moles of Al,
Total F mole of electrons
Where F= Faraday's constant= 96500 C
So, 12F moles of electrons are transferred.
Learn more about Faraday's Law here,
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