The Sunshine Tutor On Ksunradio.com: Recent Episodes
petra science tutors
Defines Bearings, how they are represented, and solves exercises on exam-type questions on Bearings & Distances..
Your Sunshine Tutor explains one of the most important topics in Chemistry- "The Mole" (which is the quantity used by scientists to measure stuff, much like market women measure food stuff)...and 1 Mole contains the Avogadro number of particles...
The old klmn electronic notation can be easily used to determine the group/period the first 20 elements belong to on the Periodic Table.