Filtration, devastation, and evaporation are examples of

a- ways in which scientists distinguish between elements and compounds.

b- separation by chemical means.

c- separation by physical means.

d- ways in which scientists separate compounds.

An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons

How can parts of a solution be separated by chromatography?

In what way do investigations build scientific knowledge? the results of investigations lead to questions that cannot be tested. they reflect the opinions and social values of scientists, ensuring valid information. the results of investigations lead to new questions, which lead to new investigations. they are not influenced by the research of earlier scientists, so they are able to address gaps in understanding. i