AP BIOLOGY

Detailed explanation-1: -A water molecule has three atoms: two hydrogen (H) atoms and one oxygen (O) atom. That’s why water is sometimes referred to as H2O. A single drop of water contains billions of water molecules.

Detailed explanation-2: -The area around the oxygen is somewhat negative compared to the opposite, hydrogen-containing end of the molecule, which is slightly positive. Opposites attract, so this lopsided charge difference allows bonds to form between the hydrogen and oxygen atoms of adjacent H2O molecules.

Detailed explanation-3: -Water is formed by the chemical combination of hydrogen and oxygen. A molecule of water consists of 2 atoms of hydrogen and 1 atom of oxygen, combined chemically.

Detailed explanation-4: -To find out what water is made of, it helps to look at its chemical formula, which is H2O. This basically tells us that the water molecule is composed of two elements: hydrogen and oxygen or, more precisely, two hydrogen atoms (H2) and one oxygen atom (O). Hydrogen and oxygen are gases at room temperature.

Detailed explanation-5: -Water is a chemical compound made up of hydrogen and oxygen combined in the ratio 2:1 by volume or 1:8 by mass (2 g of hydrogen combines with 16 g of oxygen).