【】How Many Neutrons Does Lithium Have?||Number of Neutrons in Lithium

Answer:

Lithium has four neutrons for this isotope.

Explanation:

Hello,Everyone! today we are going to learn  about how many neutrons lithium have in just 3 steps.

To find out the number of neutrons  for lithium,we have to have knowledge about atomic number,atomic mass,mass number of lithium.

                    Step-1:


●The atomic number of lithium is the number of protons in lithium's nucleus.



●The atomic mass of lithium is the average number of  protons plus neutrons of all the isotopes of lithium.


●The Masss number of lithium is the number of protons plus neutrons of a specific isotope of lithium.

                    Step-2:

We need to convert atomic mass of lithium to mass number of  lithium by rounding if necessary (In case of fraction) .

From periodic table,


  ●Atomic number of lithium  is 3(three).

●Atomic mass of  lithium is 6.94

●To find out mass number,we need to round 6.94 to a whole number.So,by rounding,we are getting mass number  of lithium.The mass number of helium is 7.




                    Step-3:

By the difference between mass number and atomic number of lithium,we get the number of neutrons in lithium.


●Number of neutrons=7-3=4
Therefore,the number of neutrons in lithium is 4 here for this isotope.

● Number of electrons in lithium is 3.Remember number of electron equals to proton.

●Number of protons in lithium is 3.

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