If an atom has 104 electrons, 157 neutrons, and 104 protons, what is its approximate atomic mass?

If an atom has 104 electrons, 157 neutrons, and 104 protons, what is its approximate atomic mass?

What is the name of this element?

Solutions

Expert Solution

mass of neutron = Mn = 1.00898 u

mass of proton = Mp = 1.00759 u

atomic mass = (number of neutrons*mass of neutron ) + (number of proton*mass of proton)

atomic mass = (157*1.00898) + (104*1.00759) u = 263.2 u <<---answer

atomic number = 104

element = Rutherfordium <<--answer

genius_generous answered 1 year ago

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