WHY IS IT MORE DIFFICULT TO REBUILD ON LAND IMPACTED BY LAVA FLOWS THAN IT IS TO REBUILD ON LAND AFFECTED BY OTHER KINDS OF NATURAL HAZARDS?

Classify this reaction: 2al+n2-> aln.

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

If many scientists conduct the same or similar experiments, and all obtain similar results, a can be written, which is a generally agreed-upon statement that explains and predicts how a natural phenomenon works.