What do the following words have in common that has nothing to do with their meanings?

1. CAN

2. AGO

3. CUP

4. NAB

5. HEN

6. SINE

HINT:

Chemistry

Answer:

 

By changing some of the upper case letters to lower case, each word will be made up of elements from the Periodic Table: 

 

1. CaN

2. AgO

3. CuP

4. NaB

5. HeN

6. SINe

 

Ca - Calcium

Ag - Silver

Cu - Copper

Na - Sodium 

He - Helium

Ne - Neon