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liq [111]
2 years ago
5

ANSWER ASAP IF YOU KNOW THIS ......What is the mass number of this atom?

Chemistry
2 answers:
trasher [3.6K]2 years ago
6 0
The correct answer is 7 I just took the test :)
Fittoniya [83]2 years ago
3 0

The answer is 7 I took this test.

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Answer:

The atomic mass of the boron atom would be <em>10.135</em>

Explanation:

This is generally known as relative atomic mass.

Relative atomic mass or atomic weight is a physical quantity defined as the ratio of the average mass of atoms of a chemical element in a given sample to the atomic mass of 1/12 of the mass of a carbon-12 atom. Since both quantities in the ratio are masses, the resulting value is dimensionless; hence the value is said to be relative and does not have a unit.

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Relative atomic mass of Boron = (18.5/100 x 11) + (81/100 x 10)

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