A student is using legos to create a model of the chemical barium phosphate Ba3(PO4)2. Barium atoms are represented by green legos, phosphorus atoms by yellow legos and oxygen atoms by blue legos. What combination of legos should the student use to complete the model?

An engineering team designs a new rocket that is faster and lighter than any other model being produced. however, the materials end up being so expensive that no company can afford to buy them. which step of the engineering process should have addressed this problem? a. know the background. b. evaluate the results. c. identify a need. d. do the work.

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

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