Exploring Chemical Formulas and Atoms

What is the chemical symbol for oxygen?

How many hydrogen atoms are present in one molecule of water ( $$H_2O$$ )?

Which element is represented by the symbol "Na" on the periodic table?

What is the total number of atoms in the chemical formula $$CO_2$$ ?

Given the formula $$C_6H_{12}O_6$$ , how many different elements are present in this compound?

If a chemical formula is $$NaCl$$ , use the periodic table to identify the names of the elements present.

How many oxygen atoms are in the formula $$Al_2(SO_4)_3$$ ?

A student is given the formula $$Ca(OH)_2$$ . Using the periodic table, how many total atoms are in one molecule of this compound?

A chemist wants to create a compound with 2 sodium atoms, 1 sulfur atom, and 4 oxygen atoms. Which of the following formulas correctly represents this compound?

You are given the formula $$Mg_3(PO_4)_2$$ . Explain how you would determine the total number of oxygen atoms in this compound.