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Scorpion4ik [409]
3 years ago
12

Please help and thank you

Chemistry
1 answer:
leonid [27]3 years ago
6 0
The answer is C . Hope it helps
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Answer:

The atomic number of Selenium is 34. This means that Selenium possesses 34 electrons.

The atomic number of Aluminium is 13. This means that Aluminium has 13 electrons.

Hence, there is a difference of 21 between the number of electrons in an atom of selenium and the number of electrons in an atom of aluminium.

Selenium has 6 electrons in it's outer most shell whereas aluminium has 3 electrons in its outer most shell. As a result, aluminium will have a greater tendency to lose one of its outer most electrons to become stable.

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3 years ago
three students made multiple weighings of a copper cylinder each using a different balance. Describe the accuracy and precision
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I think that you have put up an incomplete question. However, i am answering the question based on my research and knowledge. 

Lissa- accuracy and precision are both low
Lamont- accuracy and precision are definitely high
<span>Leigh Anne- accuracy is low but precision is definitely high.
</span>
I hope that this is the answer that you were looking for and the answer has definitely come to your desired help.
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The distance from one crest to another crest or from one trough to another trough is called wavelength. Hope it helps
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