Pinterest • The world’s catalogue of ideas

This is a science video that explains Atomic Number and Mass Number of an atom and how they are linked to the electrons, protons and neutrons of an at...

85
7
2

How to Calculate Molar Mass - YouTube One mole of any element express: 1. Avogadro’s number of atoms 2. The molar mass in grams. This can be written as a conversion factor.

43
5
from BuzzFeed

5 Of Earth's Most Catastrophic Life-Wiping Events

A not-terrible breakdown of 5 of Earth's most Catastrophic mass extinction events

68
9
from The Huffington Post

The Drug War And Mass Incarceration By The Numbers

499
60