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defon
3 years ago
15

An element has 4 protons, 5 neutrons, and 4 electrons. What is the atomic mass of the element

Physics
1 answer:
vfiekz [6]3 years ago
7 0
Beryllium: mass number of an atom = number of neutron + number of proton in the nucleus = 5+4=9
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Answer:

1.99 parsecs.

Explanation:

We have been given that the most recently discovered system close to Earth is a pair of brown dwarfs known as Luhman 16. It has a distance of 6.5 light-years.

We know that one light year equals to 0.306601 parsecs. To convert 6.5 light-years to parsecs, we will multiply 0.306601 by 6.5.

6.5\text{ Light-years}=6.5\times 0.306601\text{ Parsecs}

6.5\text{ Light-years}=1.9929065\text{ Parsecs}

6.5\text{ Light-years}\approx 1.99\text{ Parsecs}

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3 years ago
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8 0
3 years ago
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Answer:

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