Question

review and discuss: what did we learn about the periodic table and chemical formulas? how do you determine the number of atoms in a compound?

Explanation:

For the first question, we learned that the periodic table organizes elements by atomic number, showing their properties, and chemical formulas represent the composition of substances. For the second question, you look at the sub - scripts in the chemical formula. Each sub - script indicates the number of atoms of the corresponding element in the compound. If there is no sub - script, it means there is 1 atom of that element.

Answer:

We learned the periodic table organizes elements by atomic number and shows properties, and chemical formulas represent substance composition. To determine the number of atoms in a compound, look at the sub - scripts in the chemical formula (1 if no sub - script).