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answers.yahoo.com/question/index?qid=20090321103942AAY6zh6

Best Answer: Mass number Explanation: Atoms of the same element can have different numbers of neutrons; the different possible versions of each element are called isotopes. from second source you have looked at a periodic table you may have noticed that the atomic mass of an element is rarely an even number ...

www.reference.com/science/isotopes-same-element-alike-e652b5f325ff1f7b

Isotopes of the same element have the same number of protons and electrons when in neutral atomic form. Different isotopes have different numbers of neutrons in their nuclei, resulting in different atomic weights for the different isotopes of a single element.

www.answers.com/Q/Isotopes_of_an_element_must_have_different

The isotopes of an element must have a different amount of neutrons. I'm pretty sure you know what these are, but just in case: A neutron is a sub-atomic part of an atom, together with protons and ...

www.quora.com/What-do-isotopes-of-an-element-have-the-same-number-of

The answer is proton. Perhaps the best example that has a historical background and numerous ongoing debates is that of Uranium. Uranium has 92 protons and has 3 naturally occurring isotopes denoted as U234, U235 and U238. The difference is due to...

quizlet.com/43222439/isotopes-year-11-flash-cards

Isotopes Year 11. A Quizlet set to help students study for the atomic structure component of AS 1.5. ... isotopes must have the same. number of protons. isotopes always have different numbers of. neutrons. the mass numbers of two isotopes of the SAME element will always be.

simple.wikipedia.org/wiki/Isotope

The atoms of a chemical element can exist in different types. These are called isotopes.They have the same number of protons (and electrons), but different numbers of neutrons.Different isotopes of the same element have different masses. Mass is the word for how much substance (or matter) something has.Things with different masses have different weights.

quizlet.com/110818653/isotope-practice-quiz-flash-cards

Isotopes of the same elements must have the same number of _____ Protons. Isotopes of the same element must have different number of _____ Neutrons. A number that follows their name or symbol identifies different isotopes (example C-12 or c-12). ... Start studying Isotope Practice Quiz. Learn vocabulary, terms, and more with flashcards, games ...

ths.sps.lane.edu/chemweb/unit7/problems/isotopes

Unit 7 Quiz--Isotopes: Multiple Choice (Choose the best answer.) Isotopes of the same element must have the same number of neutrons. protons. electrons. both A and B. both A and C. Isotopes of the same element must have different numbers of neutrons. protons. electrons. both A and B. both A and C. A neutral atom of 37 Cl has 37 protons, 37 ...

www.dummies.com/education/science/chemistry/isotopes-different-types-of-atoms

Atoms in a chemical element that have different numbers of neutrons than protons and electrons are called isotopes. The atoms in a particular element have an identical number of protons and electrons but can have varying numbers of neutrons. Hydrogen is a common element on earth. Hydrogen’s atomic number is 1 — its nucleus contains […]

en.wikipedia.org/wiki/Isotope

Each atomic number identifies a specific element, but not the isotope; an atom of a given element may have a wide range in its number of neutrons. The number of nucleons (both protons and neutrons) in the nucleus is the atom's mass number, and each isotope of a given element has a different mass number.