Which of the following is ALWAYS the same for different isotopes of a single element?
A) atomic number
B) atomic mass
C) the number of neutrons
D) half-life

Question

Quizplus · Accepted Answer

The atomic number, which represents the number of protons in the nucleus of an atom, is unique to each element and determines its chemical properties. Isotopes of an element have the same number of protons but different numbers of neutrons, resulting in different atomic masses. Therefore, B and C are not always the same for different isotopes of a single element. Half-life refers to the amount of time it takes for half of a sample of radioactive material to decay and is specific to each isotope.

Which of the Following Is ALWAYS the Same for Different