8. The sum of the number of protons and neutrons in an atom is called the _______________.

7. Any of the two or more atoms of the same element that have different numbers of neutrons. _______________

The number of protons in each atom of an element is known as:Question 16Select one:a.electron numberb.neutron numberc.mass numberd.atomic number

The ______________ contains protons and neutrons in an atom

An atom of an element contains 29 electrons and 35 neutrons. The number of protons are:

In a neutral atom, the number of protons is always equal to:A  the number of neutronsB  the number of electronsC  the number of nucleonsD  the atomic mass*1 pointABCD