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Butoxors [25]
4 years ago
11

One isotope of sodium has 11 protons and 7 neutrons. What is the mass number of this isotope?

Biology
2 answers:
Alecsey [184]4 years ago
7 0

The mass number, also known as an atomic mass number or nucleon number, refers to the total number of neutrons and protons (in a combination known as nucleons) in an atomic nucleus. It determines the atomic mass of atoms. However, while calculating the mass number, the small contribution of mass from electrons is ignored.  

Mass number is equal to Number of protons + Number of neutrons  

Mass number = 11 + 7 = 18.  

Hence, the correct answer is 18.  


Vlad [161]4 years ago
3 0
Your answer would be D)18. 
If you need any help with this subject, brainly actually has an article on it! (:
brainly.com/app/studyguide/9
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