1.What are neucleons ?
2. What is the atomicity of Ca(OH)₂?

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Solution

1)In chemistry and physics, a nucleon is either a proton or a neutron,.They are called so because they are inside the nucleus.

2)Atomicity refers to the total number of atoms in the compound.
In Ca(OH)2
1 atom of Ca
2 atom of O
2 atom of H
therefor atomicity = 5

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