Question

how to calculate no of neutrons in H2O?

Answer 1

Actually each molecule of water consists of H2O.

H is just one proton and one electron. No neutrons.
O is 8 protons, 8 neutrons, and 8 electrons.

So H2O consists of a total of 10 protons, 8 neutrons, and 10 electrons.



Hope it helps

Answer 2

The number of neutrons in H2O is 8.

• H2O is made up of two hydrogen atoms and 1 oxygen atom.
• Protons in hydrogen are one but the number of neutrons is 0.
• Oxygen contains 8 protons and 8 neutrons.
• So, a total number of neutrons in water = number of neutrons of hydrogen + number of neutrons in oxygen.
• Now, the Number of neutrons = 2(0) + 8 = 8

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