Naturally occurring Neon consists of two isotopes: 20Ne and 22Ne. How many neutrons are in each isotope?

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Explanation: 

The isotpes of an element consists of same number of protons but differ in the number of neutrons.Ne has atomic number 10 which means it has 10 number of protons.

The atomic mass of an element is the total number protons and neutrons.

Ne20 - has atomic mass 20

atomic mass = number of protons + number of neutrons

20 = 10 + neutrons

number of neutrons = 20 - 10 = 10

Ne22 has aotmic mass 22

atomic mass = number of protons + number of neutrons

22 = 10  + neutrons

number of neutrons = 22-10 = 8    

 

Answer: 

20Ne has 10 neutron and 22Ne has 8 neutrons

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