Question

An atom has a proton mass of 35, a neutron mass of 35, and an electron mass of 3. What is the estimated mass of the atom.

Answer 1

Answer: Answer choice B . 70 (35 protons + 35 neutrons)

Step-by-step explanation:

Answer 2

The estimated mass of the atom is 70 amu

Step-by-step explanation:

An atom has a proton mass of 35, a neutron mass of 35, and an electron mass of 3.

Mass of an atom is equal to the sum of number of protons and number of neutrons.

In this case, number of protons p = 35

Number of neutron n = 35

So, the estimated mass of the atom will be :

`M=35\ protons+35\ neutrons=70\ amu`

Hence, this is the required solution.