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.
Symptoms of Ulnar Collateral Ligament (UCL) Injury or Sprain. 1  Sharp pain on the inside of the elbow. 2  Tingling or numbness radiating down to ring and small fingers. 3  Instability in the elbow, a sense of looseness.  Inability to throw 1  normally. Feel or hear a pop when moving the elbow.