Which of the following is always the same for different isotopes of a single element?
A)atomic number
B)atomic mass number
C)tendency to decay radioactively
D)half-life

Question

Quizplus · Accepted Answer

The atomic number of an element is equal to the number of protons in its nucleus, which is the defining characteristic of an element. Isotopes of the same element have different numbers of neutrons, which gives them different mass numbers but does not change their atomic number.

Which of the Following Is Always the Same for Different