How do you calculate and determine atomic number, mass number, and net charge? Atomic number is the number of protons in an atom. Mass number is the number of neutrons in an atom, and net charge describes how the protons and electrons balance out. Tip: This isn't the place to ask a question because the teacher can't reply.
PCL Tear Symptoms & Diagnosis. 1  Pain. Mild to moderate pain in the knee can cause a limp, knee âgiving outâ, or difficulty walking. 2  Swelling. Within hours of the injury, knee will swell rapidly. 3  Instability. Feeling of a loose knee and not stable when standing or walking.
But for someâwhether you just didn't get the right rehab help or surgery didn't go off as plannedâthe pain can linger. The most common symptoms of an ACL injury can be a sudden popping sensation of the knee, swelling, and an inability to extend the knee to a full range of motion, says Dr. Michael Camp, D.P.T. He adds that other signs involve tendinitis, buckling of the knee, deep throbbing pain, and unsteadiness when walking.