Answer:
Option A) oxygen
Explanation:
Oxygen gas it the electrolysis of an aqueous solution of sodium nitrate which a gas forms at anode it is called the oxygen gas
<em><u>maybe </u></em><em><u>this </u></em><em><u>answer</u></em><em><u> might</u></em><em><u> help</u></em><em><u> u</u></em><em><u> out</u></em>
<span>The atomic number is the number of protons in the nucleus. These are the only nuclear particles carrying charge; each carries a charge of 1 elementary unit.
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answer = 11 just because that is the amount of protons it has and therefore positive charge</span>
Far apart and have weak attractive forces between them
That would result in an exothermic reaction.
Hope this helps :)
The best answer to your question would be B:those who could not be broken down by physical means.