Which of the following atomic numbers represent an element that is radioactive on the periodic table.

1. N=11
2.N=56
3.N=81
4.N=100

Drag each item into the proper state of matter category.

If the specific heat of a metal is 0.850 j/g °c, what is its atomic weight?

Which sentences describe point source pollution? in this type of pollution, the source of the pollution is single and easily identifiable. when runoff water from the melting of snow mixes with debris, it creates pollution. the runoff water, mixed with pollutants, reaches large areas with disastrous effects. alternatively, when a wastewater treatment plant releases harmful chemicals into a stream, the chemicals pollute the stream water because they are not treated for safety.