B. compound a material that contains three elements joined in a fixed proportion
Sorry, Cant really tell how to differentiate the students and trial times
A lithium atom has 3 protons and 3 electrons. It can lose one of its electrons, making it an ion. It now has more positive protons than electrons so it has an overall positive charge. Overall charge is +1
Foreshocks and aftershocks can happen at the same time is not true.
