pleaseeees Help me in nucli chapter what is the formula of del m . how they convert mass of proton into amu. PLS. DO ITSOON .

The formula for Mass defect is given below,

Δm = [Zm_p + (A − Z) m_n − m_N]
here,
In a nucleus 

Z = Number of protons

A = Number of protons + Number of neutrons

Let m_p = Mass of a proton

m_n = Mass of a neutron

m_N = Mass of nucleus 

Also,
 

• The unit in which atomic and nuclear masses are measured is called atomic mass unit (amu).

• One amu is defined as 1/12^th of the mass of an atom of isotope.

Avogadro’s number = 6.023 × 10²³

∴ Mass of 6.023 × 10²³ atoms of C¹² = 12 g

So , by using this formula we can convert mass of proton (in Kg ) to amu.