Which of the following is used for chemical symbols today?
a. drawings
c. letters
b. icons
d. numbers

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride

How many moles are in 123.0 grams of kclo4?

One similarity and one difference between an element and a mixture of elements