1. electrons elements with properties intermediate between those of metals and nonmetals
2. metals
elements that are malleable, polish to a luster, conduct heat and electricity well and tend to lose electrons in a chemical reaction
3. period
a vertical column on the periodic table
4. compound
two or more elements that have chemically combined
5. solution
positively charged, subatomic particles found in the nucleus of the atom
6. protons
negatively charged, subatomic particles
7. group
a homogeneous mixture whose particles are too small to reflect or scatter light
8. metalloids
a horizontal row on the periodic table

Dying the folding patterns of protein molecules can microbiologists better understand cellular processes as well as some diseases, such as alzheimer’s, that are caused by proteins that have misfolded. the folding of these complicated molecules can be simulated on computers, but it takes a lot of processor power and time for even expensive supercomputers to do this. a group of researchers at stanford university developed software that can be used to distribute the processing of data to anyone who is willing to donate time on their idle personal computers. as a result, the researchers have been able to achieve protein-folding simulations that are far better than those other computing methods have done. which statement best describes the work of these researchers? the work is not scientific because the data are not processed in one location. the work is not scientific because the simulations are not reproducible. the researchers applied creativity to solve a problem in running an experiment. the researchers used only well-established scientific techniques.

Ineed to find the answer of this question because i dont understand it

Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness