Suppose you've just heard an opera singer warm up her voice. Write your own science question about the sounds a singer makes.

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

How can the periodic table be used to predict the behavior of elements?

To find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? a) when more work was done, the couch was moved the same distance. b) when more work was done, the couch was moved less. c) when more work was done, the couch was moved further. d) when more work was done, the couch wasn't moved at all.