Describe what happened to the particles when the strengthening progress occur

One or more substances changing into one or more substances is an example of a

Chemistry worksheet - i am not sure what they are asking for exactly?

Acm ruler with main graduations from 1 to 10 from left to right there are 10 secondary graduations between each of the main graduations there is a line that begins. at the left end of the ruler 10 secondary graduations to the left of the “1 main graduation the right end of the line ends on the eighth secondary graduation to the right of 3 how long is the line