🔍 Key Concepts

• Chemical symbols use one or two letters that come from the element’s name (like N for nitrogen, H for hydrogen, O for oxygen) • Ammonia is a compound made of nitrogen and hydrogen atoms • In chemical formulas, a subscript number (like 2 or 3) tells you how many atoms of that element are in one molecule

💭 Think About

• Which letter in the choices looks like the correct chemical symbol for nitrogen? • Which letter in the choices looks like the correct chemical symbol for hydrogen? • Once you find the right letters for nitrogen and hydrogen, which option has them combined with the correct number of hydrogen atoms found in ammonia?

✅ Before You Answer

• Verify that the option you choose uses real element symbols from the periodic table (for example, N for nitrogen, H for hydrogen). • Check that the subscript number next to hydrogen matches the typical formula of ammonia in basic chemistry references. • Confirm that there are no extra letters in the formula that are not valid element symbols.