The atomic number of this element is 9 and its mass is 20. how many neutrons does this element have?

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asked Mar 28, 2018 161k views

3 votes

The atomic number of this element is 9 and its mass is 20. how many neutrons does this element have?

Chemistry
high-school

Erick Sasse asked

by Erick Sasse

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2 Answers

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Hey there!

n = A - Z

n = 20 - 9

n = 11

KingPin answered Mar 29, 2018

by KingPin

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4 votes

Answer:

11 neutrons

Step-by-step explanation:

Mass no. = 20

atomic no. = 9

no. of neutrons = mass number - atomic number

= 20 - 9

= 11 neutrons

DruidKuma answered Apr 1, 2018

by DruidKuma

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