How has the work of chemists affected the environment?

a. a single chemical can sometimes both hurt and the

environment.

b. the chemicals that chemists use can all be to the

environment.

c. the work of some chemists causes environmental problems,

while the work of others tries to fix problems.

d. all chemists use chemicals that are bad for the environment.

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?

What characteristics does a earthquake have

The image compares the arrangement of electrons in two different neutral atoms. a figure labeled atom q has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has six black spheres. to the left of this figure is another figure labeled atom p. atom p has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has seven black spheres. which of the following best explains the position of the two atoms in the periodic table?