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Dima020 [189]
4 years ago
8

An atom has a mass number of 9 and 5 neutrons. What is its atomic number?

Chemistry
1 answer:
Digiron [165]4 years ago
3 0

Answer:

D.4

Explanation:

Number of neutron= mass number - atomic number

where; d no of neutron is 5

d mass no is 9

atomic number be x

5=9-x

x=9-5

x=4

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