Initial idea which is believed to be true

When determining the shape of a molecule, it is important to draw a lewis dot structure first in order to see the total number a. electrons within the moleculeb. bonding and unshared pairs around central atomc. unshared pair within the molecule( i really need it )

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

Which of the following electromagnetic waves can create ions?