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15 votes
15 votes
An atom has atomic number 5 and mass number 11. How many neutrons does the atom have?

A- 5
B- 6
C- 10
D- 11

User Ray Koren
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2.6k points

1 Answer

23 votes
23 votes

Answer:

B

Step-by-step explanation:

neutrons + atomic number/proton/electron for a neutral atom = mass number

e.g

mass number of Chlorine 35.5

proton number 17

neutron number will be 35.5-17 = 18.5

Therefore.....

your question deduced says

atomic number is 5

mass number is 11

neutron number is however mass number minus atomic number 11-5 =6

User MHOOS
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2.7k points