Instructions: Complete each question by choosing or typing in the best answer. To receive the highest score, be sure to leave no
thing blank. When you have completed the test, click the "Grade My Test Now" button at the end of the test. If you run out of time, click the "Save for Me to Complete Later" button. Tests are automatically saved in case of internet disruption. Language: English Español 1) When can a scientific theory be changed? A) when new technology is developed B) after another scientist does an experiment never, once it is a law or theory it is impossible to change after many experiments and much more data has been collected
That's correct. Once Aluminum becomes an ion, it is very hard to force it to take back its electrons. Only a few elements can do it. Iron is not one of them.
