Ions X, Y, and Z are initially held fixed in the orientation shown below:
Which of the following vectors corresponds to the direction ion Z will move immediately after it is released from its fixed position?
Click for Explanation
Ion X (+2e) pushes ion Z (+e) down and to the right. Ion Y (-e) pulls ion Z (+e) down and to the left. The magnitude of the force created by ion X (+2e) is twice that of the force created by ion Y (-e) due to the difference in charge. The relative forces that act on ion Z are shown below.
The resultant force from the addition of ZX and ZY is shown as vector ZX+Y, which causes ion Z (+e) to move down and to the right. Thus, answer choice is D is correct.
Want more MCAT practice?
We’ve got options for every schedule and learning style!
Whether you need the flexibility of a Self-Paced Course, the instruction of a live 515+ Course, or the 1:1 attention of a private MCAT tutor, Blueprint MCAT has the MCAT prep option that works for your learning style!
Get started with a free MCAT diagnostic, one free practice exam, and tons more MCAT prep resources.
Not sure which option is right for you? Schedule a free MCAT consultation with an MCAT expert using the form below. No obligation, just expert advice.
