3 years ago

NEED HELP ASAP WILL GIVE BRAINLIEST. What is the element that has the atomic number of 17?

Chemistry

1 answer:

salantis [7]3 years ago

5 0

Hey buddy the answer is Chlorine ..

plzz follow me I'll help u more if u need

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Write the balance chemical equation for propane.

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green to blue, hot to cold, bubbles (lol), and liquid to gas

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3 years ago

Boron has two naturally-ocurring isotopes. Boron-10 has an abundance of 19.8% and actual mass of 10.013 amu, and boron-11 has an

aniked [119]

Answer:

Average atomic mass = 10.812 amu

Explanation:

The formula for the calculation of the average atomic mass is:

$Average\ atomic\ mass=(\frac {\%\ of\ the\ first\ isotope}{100}\times {Mass\ of\ the\ first\ isotope})+(\frac {\%\ of\ the\ second\ isotope}{100}\times {Mass\ of\ the\ second\ isotope})$

Given that:

For first isotope, Boron-10:

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Mass = 10.013 amu

For second isotope, Boron-11:

% = 80.2 %

Mass = 11.009 amu

Thus,

$Average\ atomic\ mass=\frac{19.8}{100}\times {10.013}+\frac{80.2}{100}\times {11.009}=1.982574+8.829218=10.811792$

Average atomic mass = 10.812 amu

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3 years ago

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10 POINT

MAVERICK [17]

the correct answer is B

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