do all isotopes of an element have the same atomic number? can you give an example, please?

Question

wolfe8 · Answer

Welcome to OpenStudy. First, what is the definition of isotope?

anonymous · Answer

An isotope is an element(s) that all have the same mass number.

wolfe8 · Answer

O.o That doesn't sound right to me.

wolfe8 · Answer

Isotopes are variants of a particular chemical element such that, while all isotopes of a given element have the same number of protons in each atom, they differ in neutron number.-Wikipedia

So what do you think?

anonymous · Answer

My physical science teacher told me that is what an isotope is.. hmmmm......

anonymous · Answer

each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.--Google...

wolfe8 · Answer

Isotopes have different number of neutron and hence nucleon. Their proton number is the same.

wolfe8 · Answer

Well see, mass number is made of protons AND neutrons so they cannot be the same since neutrons differ.

unklerhaukus · Answer

The atomic number is equal to the number of protons, and defines the element, the number of neutrons will determine the isotope,

for example Chlorine always has 17 protons, 
Cl has two stable isotopes,  Cl-35 (which has 35-17=18 neutrons), 
                                    and Cl-37  (which has 37-17=20 neutrons),

anonymous · Answer

Thank you !!!!