How many neutrons are in water?

Answer 1

In a single molecule of water : 10 protons (1 from each hydrogen and 8 from oxygen)

8 neutrons (none from hydrogen and 8 from oxygen)

water = H2O 10 electrons (1 from each hydrogen and 8 from oxygen)

To work out how many electrons, protons and neutrons in a molecule;

Find the ballenced chemical equation - H20 in this case

Look up each element in the Periodic Table - hydrogen and oxygen in this case

Count the electrons, protons and neutrons - you do this by looking at the top numbers and the bottom numbers for each element. The top number is the "atomic weight" of the element, so the total number of protons and neutrons as each 1 unit of mass. The bottom number is the "proton number" number of electrons and protons (each) so for oxygen where the number is 8, there are 8 protons and 8 electrons. To work out the number of neutrons simply take the bottom number from the top number as you are taking the number of protons away from the total weight to give you whats left, which is the number of protons.

Do a little bit more adding - H2O = 2 + 8 electrons

= 2 + 8 protons

= 0 + 8 neutrons

And your done. Easy

Answer 2

Let's just consider "ordinary" water with no rare isotopes.

A single molecule of water has two hydrogen atoms with one oxygen atom.

Hydrogen has no neutrons

Oxygen has 8 neutrons.

So, the answer is that each water molecule has 8 neutrons.

Answer 3

Water is made up of one oxygen atom and two hydrogen atom. Oxygen has 8 neutrons and hydrogen has 0, so one water molecule has 8 neutrons. This is generally the case, the exception being heavy water (used to cool fission reactions). In this case the hydrogen can become deuterium (hydrogen with neutrons). Thus heavy water can contain as many as 10 neutrons.

To my knowledge no higher level isotopes of hydrogen are found in normal or heavy water, as tritium is radioactive and decays to helium.

Answer 4

The chemical formula for water is H2O, consisting of two hydrogen atoms and one oxygen atom. All hydrogen atoms have one proton and zero neutrons. Oxygen is composed of 8 protons and 8 neutrons. Therefore, by addition, there are 10 protons and 8 neutrons in a molecule of water.

Answer 5

In a normal water molecule there are eight neutrons.

But in "heavy" water or deuterium oxide, there are two extra, making ten.

Answer 6

Hydrogen: 1 Proton, 0 Neutrons

Oxygen: 8 Protons, 8 Neutrons

Water: 9 Protons, 8 Neutrons.

Yy

Answer 7

If no neutrons are taken away or added, there should be 10 neutrons.

Answer 8

(1) Protons: 1(hydrogen) + 1(hydrogen) + 8(oxygen) = 10

(2) Electrons: 1(hydrogen) + 1(hydrogen) + 8(oxygen) = 10

(3) Neutrons: 0(hydrogen) + 8(oxygen) = 8