The Masses of Atoms, Molecules and Ions

IMPORTANT

The Masses of Atoms, Molecules and Ions: Overview

This topic covers concepts, such as, Reference Elements for Atomic Mass, Carbon as a Reference Element for Atomic Masses, Calculation of Molecular Mass of Compounds & Calculation of Average Atomic Mass from Isotopes of an Element etc.

Important Questions on The Masses of Atoms, Molecules and Ions

MEDIUM
IMPORTANT
Chemistry>Reacting Masses and Chemical Equations>The Masses of Atoms, Molecules and Ions> Q 1

Bromine is an element with two isotopes, with mass numbers 79 and 81. Its relative atomic mass is often given as 80. What does that tell you about the relative abundance of the two isotopes?

MEDIUM
IMPORTANT
Chemistry>Reacting Masses and Chemical Equations>The Masses of Atoms, Molecules and Ions> Q 2

Write about the need for reference elements in the calculation of atomic mass.