Answer:
The molecular formula lists the symbol of each element within the compound followed by a number (usually in subscript). The letter and number indicate how many of each type of element are in the compound. If there is only one atom of a particular element, then no number is written after the element.
Answer:
A system of knowledge and the methods to find that knowledge is Science.
What is the element with 7 protons? They probably also have 7 neutrons. Just a ball park figure guess.
