Question

O Which of the following determines the

identity of an element?
a. atomic number
b. mass number
c. atomic mass
d. Overall changes

Answer 1

A. atomic number

Step-by-step explanation:

the mass number alone cannot uniquely identify an element. But the number of protons in the nucleus identifies it uniquely. In addition, if the atom is neutral, then the atomic number also equals the number of electrons in its orbitals.