Why does it take two hydrogen atoms in water?

Each water molecule can form FOUR ‘hydrogen bonds’ with neighbouring water molecules as it does in ice. To form water molecule, hydrogen require one electron and oxygen require two electrons. So two electrons are shared by two hydrogen atoms.

Why do you need 2 water molecules to make 1 oxygen molecule?

The difference is due to the fact that one water molecule has two hydrogen atoms to one oxygen atom, as explained above. This means it takes two water molecules (2 H2O) to make one oxygen molecule (O2). At the same time, however, two molecules of water (2 H2O) can make two molecules of hydrogen (2 H2).

Why is water not a gas at room temperature?

Short answer: because water bears hydrogen bonding, which holds molecules together. Those inter-molecular bonds are strong enough to resist the motion of water molecules that would otherwise break free and move freely if they weren’t strong enough.

Why does the oxygen atom in H2O water need two hydrogen atoms to bond with?

Because oxygen and hydrogen attract the shared electrons unequally, each end of the V-shaped H2O molecule adopts a slightly different charge. Opposites attract, so this lopsided charge difference allows bonds to form between the hydrogen and oxygen atoms of adjacent H2O molecules.

Why is water a liquid if hydrogen and oxygen are gases?

When two water molecules come together, the slightly positive Hs are attracted to the negative O and they cluster together. This is (basically) why water is liquid at room temperature.

Why is hydrogen sulfide a gas at room temperature?

H2S is a gas and water is liquid at room temperature. So, water exists as a liquid at room temperature with a high boiling point. Whereas, Sulphur is less electronegative than oxygen, and the S-H bond is much less polar than the O-H bond. Hence, there is no hydrogen bonding in hydrogen sulphide, and it exists as a gas.

What would happen if water couldn’t hydrogen bond?

Without hydrogen bonds, water molecules would move faster more rapidly, with less input of heat energy, causing the temperature to increase more for each calorie of heat added. This would also greatly reduce the amount of heat energy needed for phase changes from ice to liquid, and from liquid to vapor.

How does hydrogen bonding occur in water?

A hydrogen bond in water occurs between the hydrogen atom of one water molecule and the lone pair of electrons on an oxygen atom of a neighboring water molecule. Hydrogen bonding occurs only in molecules where hydrogen is covalently bonded to one of three elements: fluorine, oxygen, or nitrogen.

How many atoms of hydrogen are in a molecule of water?

The formula H20 tells us that one molecule of water is comprised of 2 atoms of hydrogen and one atom of oxygen bonded together.

How do hydrogen bonds form between water molecules?

The slight positive charges on the hydrogen atoms in a water molecule attract the slight negative charges on the oxygen atoms of other water molecules. This tiny force of attraction is called a hydrogen bond. This bond is very weak. Hydrogen bonds are formed easily when two water molecules come close together,…

Why do water molecules stick to one another?

A water molecule consists of two atoms of hydrogen linked by covalent bonds to the same atom of oxygen. Atoms of oxygen are electronegative and attract the shared electrons in their covalent bonds. But, because of the hydrogen bonds, as water molecules come together they stick to one another for a small, but significant amount of time.

Why are the hydrogen atoms in water positively charged?

Water Molecule However, the two hydrogen atoms are both on the same side of the oxygen atom so that the positively charged nuclei of the hydrogen atoms are left exposed, so to speak, leaving that end of the water molecule with a weak positive charge.