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REY [17]
3 years ago
10

Help please which substance is not a compound​

Chemistry
1 answer:
Nastasia [14]3 years ago
4 0

Magnesium is not a compound

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Can oxygen ever have more then 8 protons? why or why not
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Which of the following is the best hypothesis?
torisob [31]

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At a pressure of 19.95kPa, 35.8g of carbon dioxide at a temperature of 27.5C would result in what volume of gas?
adell [148]

Answer:

volume of gas=101.94L

Explanation:

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3 years ago
Use the periodic table to determine the electron configuration for iodine (i). express your answer in condensed form.
Dovator [93]
Iodine electron configuration is:

1S^2 2S^2 2P^6 3S^2 3P^6 4S^2 3d^10 4P^6 5S^2 4d^10  5P^5
when Krypton is the noble gas in the row above iodine in the periodic table,
we can change 1S^2  2S^2 2P^6 3S^2 3P^6 4S^2 3d^10 4P^6 by the symbol
[Kr] of Krypton.

So we can write the electron configuration of Iodine:
[Kr] 5S^2 4d^10 5P^5

8 0
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What 2 elements that share the same properties and reactivity as the silicon?
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Two elements that have similar properties has silicon would be above or below silicon. they are germanium or antimony. 
   
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