Each atom wants to follow the octet rule and have eight electrons in the valence
Both of them are correct.
Methane is an explosion hazard in enclosed areas. Liquefied Methane floats on water and boils. The vapor cloud produced is FLAMMABLE
In landfills, the food and yard waste that trash contains is decomposing and releasing methane, a greenhouse gas that's 28 times more potent than carbon dioxide.
Answer: carbon is an integral part of many biological processes, including reproduction, photosynthesis and respiration
Explanation: because carbon ability to form stable bonds with many elements, including itself.
Answer:
B. Corundum
Explanation:
Using the Mohs scale of hardness, the mineral has a hardness greater than 6.5 (Steel nail) but less than 8.5 (Drill bit). The corundum has a hardness of 9.0, which means it cannot be scratched by a drill bit, but all the other choices have a hardness scale less than 6.5 but the mineral was not scratched by the nail. So the best answer would be B.
To raise an arm upward the muscle on one side of it contracts. It relaxes the muscle on the opposite side of the arm.