The second word describes the last part of the compound.
Label what sample paper strip will contain in pencil. How were the Rf values different for each pigment and leaf? Why? Make sure to consider molecular structure, polarity, etc. Scientists came up with a naming system for compounds that is very specific. You should know that even though there are two electrons involved in a bond, those electrons can be shared in different ways. The second word describes the last part of the compound.
Ionic substances do conduct when molten or dissolved in water but never when solid. The picture below shows a water molecule bonding with another water molecule. Two chlorine atoms can share 1 electron each to form a single covalent bond.
Sulfur is the second part so scientists say SULFIDE.