Answer:
A: Within a single water molecule (H2O), there are two atoms of hydrogen (H). Hydrogen is the lightest and most abundant element in the universe, and in this case, these two hydrogen atoms are covalently bonded to a single oxygen atom.
B: In a water molecule (H2O), there is one atom of oxygen (O). Oxygen is essential for life and is the third most abundant element in the universe. It is highly electronegative, forming strong bonds with hydrogen atoms to create the familiar H2O molecule.
C: Combining the information from the previous two answers, we find that a water molecule (H2O) consists of two atoms of hydrogen and one atom of oxygen. When you add these together, the total number of atoms in a water molecule is three – two hydrogen atoms and one oxygen atom. This molecular structure gives water its unique properties and makes it vital for various biological and chemical processes.
Hope this helps a bit!