Question

If two atoms are isotopes of the same element, they have the same number of ______ but will have different numbers of _____.
A. protons; neutrons
B. neutrons; electrons
C. neutrons; protons

Answer 1

@warmachine68 @theEric @PsiSquared

Answer 2

Isotopes... I just learned about these! The answer is A. Or I'm pretty sure it is. Lol.

Answer 3

Ok, isotopes of a given element all share the same atomic number. Does that help?

Answer 4

No I am not very good at this at all.

Answer 5

Here's what an isotope is... It's really simple. Okay, pick an element from the periodic table. Let's sayyy... a very simple one. Sulfur sounds alright.

Now, (most of the time) Sulfur has 16 protons and 16 neutrons.
Now lets say Sulfur has 16 protons and 15 neutrons. It's still sulfur, right?
It can also have, like, 16 protons and 17 neutrons..
An isotope is basicly an element with a differing number of neutrons. Does that make sense? :3

Answer 6

@kcurri, atomic number is the number of protons. That should give you what you need.