Whats an isotope???

Question

Help!!!

Answer 1

An isotope of a given element has the same number of PROTONS in the nucleus (this defines the element) but a different number of NEUTRONS, so the atomic mass differs slightly. Many isotopes are unstable, and subject to radioactive decay or reaction.

Answer 2

An isotope is a variant form of an element. All isotopes of an element have the same number of protons, but different numbers of neutrons.

Answer 3

Isotopes are any of the several different forms of an element each having different atomic mass (mass number). Isotopes of an element have nuclei with the same number of protons (the same atomic number) but different numbers of neutrons.

Answer 4

According to WIKIPEDIA ........ isotopes are any of the several different forms of an element each having different atomic mass (mass number). Isotopes of an element have nuclei with the same number of protons (the same atomic number) but different numbers of neutrons. Therefore, isotopes have different mass numbers, which give the total number of nucleons—the number of protons plus neutrons.

Answer 5

Isotope are elements having same number of Protons but different number of neutrons.
They have the same chemical property and differ only in the mass number.

Every element has isotopes.
E.g-
C-12, C-14
U-238, U-237

Answer 6

Isotopes are atoms of the same element with different numbers of neutrons. Because they are the same element they have the same number of protons and electrons but because their neutrons are different they also have different mass numbers.

Answer 7

isotopes are two or more elements with the same atomic number but different mass number(different number of neutrons)

Answer 8

an isotope is an atom of an element with either more or less neutrons in its neucleus.

Answer 9

http://www.google.com/search?sourceid=navclient&ie=UTF-8&rls=GGLG,GGLG:2005-37,GGLG:en&q=define%3a+isotope