A student is asked to build a model of an atom with 6 protons and 6 electrons. The student is then asked to make an identical model of the same atom but make it an ion. To be successful in this project, the student will: A. Put six protons in the center of the model, and six electrons around the outside, then add one electron or take away one electron to make an ion.

b. Place electrons and protons in the center of the atom and create an ion by adding one more proton and one more electron to the center of the atom.

c. Put the electrons in the middle of the model and distribute the electrons around the protons. The ion will have seven protons.

d. Put six protons in the center of the atom and distribute the electrons around the protons. The ion will look the same but have seven or five electrons.

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.

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg

Which of the following is most likely true about water in chemical solutions?