Counting Atoms

Front

What is a subscript in a chemical formula?

Back

A subscript is a small number written below and to the right of an element symbol that indicates the number of atoms of that element in a molecule.

Front

How many atoms are in one molecule of water (H₂O)?

Back

There are 3 atoms in one molecule of water: 2 Hydrogen (H) atoms and 1 Oxygen (O) atom.

Front

What does the chemical formula C₆H₁₂O₆ represent?

Back

C₆H₁₂O₆ represents glucose, a simple sugar that is an important energy source in living organisms.

Front

How many different elements are in the compound NaCl?

Back

There are 2 different elements in NaCl: Sodium (Na) and Chlorine (Cl).

Front

What is the total number of atoms in the chemical formula C₈H₁₀N₄O₂?

Back

There are 24 atoms in the chemical formula C₈H₁₀N₄O₂ (8 Carbon, 10 Hydrogen, 4 Nitrogen, 2 Oxygen).

Front

How many Nitrogen (N) atoms are in 4NH₃?

Back

There are 4 Nitrogen (N) atoms in 4NH₃.

Front

How many Hydrogen (H) atoms are in 4H₂O?

Back

There are 8 Hydrogen (H) atoms in 4H₂O.

Front

What is the significance of the coefficients in a chemical formula?

Back

Coefficients indicate the number of molecules or moles of a compound in a chemical reaction.

Front

What is the total number of atoms in the chemical formula C₈H₃NaBr₁₂?

Back

There are 24 atoms in the chemical formula C₈H₃NaBr₁₂.

Front

How many different elements are present in H₂COCH₂?

Back

There are 3 different elements present in H₂COCH₂: Hydrogen (H), Carbon (C), and Oxygen (O).