You see an ad for a cell phone case that can withstand drops from high buildings, the force of a hit from a sledgehammer, and exposure to heat. How would you explain this on a molecular level?

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?

Maya wrote if you step to describe how carbon circulates between the atmosphere and living organisms