How many protons, neutrons, and electrons are there in an atom of potassium-39?

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0

Draw the lewis structure for the trisulfur s3 molecule. be sure to include all resonance structures that satisfy the octet rule.