What is another name for a beta minus (b-) particle?

This graph gives information on changes in sea ice extent in the arctic ocean over a 30-year span. the overall trend shows in the ice extent. to address the trend, scientists need to ask themselves, one direct consequence of the trend is that

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

What is the overall order of reaction for rate = k[no]2[o2]