Question

What is the mass number (A) of an atom that has an atomic number (Z=26) with 29 neutrons and 26 electrons?​

Answer 1

Atomic number=26

Neutrons=29

Electrons=26

Mass number=Proton+neutron

Protons=26

Mass number=26+29

=55

Answer 2

A = 55

Step-by-step explanation:

The atomic number is the number of protons also = the number of electrons, so basically we have 29 neutrons, 26 electrons and 26 protons. Anyway, it's asking the mass number which is the neutrons + the protons, so you just take 29+26 = 55