<span>The electrons get energy by the potential</span><span> force when we apply potential difference to a conductor moving from low to high therefore, the electrons move one to another creating electricity.</span>
Hepta is seven and tetra is four, so option c is your answer
I believe it’s the third option
Chemically combined to make a new pure substance
Consequences of oxygenation. Eventually, oxygen started to accumulate in the atmosphere, with two major consequences. Oxygen likely oxidized atmospheric methane (a strong greenhouse gas) to carbon dioxide (a weaker one) and water.
Place a burning splint near the opening of a test tube. If a popping noise occurs, it's probably hydrogen. Place a glowing splint in the test tube, and if it reignites, it could be oxygen. Place a burning splint into a test tube, and if it goes out, it could be carbon dioxide.