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How many protons, neutrons, and electrons are present in an atom of hafnium, Hf, with a mass number of

178 106 protons, 72 neutrons,
106 electrons 178 protons, 250 neutrons,
72 electrons 72 protons, 178 neutrons, 106 electrons
72 protons, 106 neutrons, 72 electrons

Respuesta :

imarsend

N: 106Answer:

72 protons, 106 neutrons, 72 electrons.

Explanation:

to solve this use this simple method: APEMAN.

A= atomic number, P= Protons, E= Electrons.

M= Mass, A= atomic number, N= neutrons.

1. APE (atomic number, protons, electrons) are the same. since Hf (Hafnium) atomic number is 72, Hf has 72 protonsand ele ctrons.

2. to get Neutrons it will be mass-atomic number= neutrons.(M-A=N)

Hf mass= 178. So, 178-72= 106 neutrons.

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VaporDPX

Answer:

106

props to the person above me

Explanation:

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