Ais a group of chemical symbols and numbers that represent the elements and the numbers of atoms of each element in a compound.

Answerwavelength;

The purpose of a lab is to do your "expirements" the importance of the topic is so you can now what the story is about and the last one is because no one is me with my question ( what is 3 over 4 x - 9 = 27 maybe you can )

British cologoinst admisitrion

Is this a question of an answer