What is an example of an isotope?

Answer 1

Isotopes are the same elements (i.e. hydrogen), with the same number of protons in the nucleus (1 for hydrogen) but different number of neutrons (there can be 0, 1, or 2). Thus:
H-1 = Normal hydrogen (1 proton, 0 neutrons)
H-2 = Deuterium (1 proton, 1 neutron)
H-3 = Tritium (1 proton, 2 neutrons)

Answer 2

Carbon has 13 known isotopes, which have from 2 to 14 neutrons in the nucleus and mass numbers from 8 to 20.

Carbon-12 was chosen by IUPAC in 1961 as the basis for atomic weights; it is assigned an atomic mass of exactly 12 atomic mass units.

Carbon-13 absorbs radio waves and is used in nuclear magnetic resonance spectrometry to study organic compounds.

Carbon-14, which has a half-life of 5,730 years, is a naturally occurring isotope that can also be produced in a nuclear reactor. It is used extensively as a research tool in tracer studies; a compound synthesized with carbon-14 is said to be “tagged” and can be traced through a chemical or biochemical reaction.

Carbon-14 has been used in the study of such problems as utilization of foods in animal nutrition, catalytic petroleum processes, photosynthesis, and the mechanism of aging in steel. It is also used for determining the age of archaeological specimens.

Answer 3

OK!
Carbon-12, the stable carbon predominating in graphite and diamond is an isotope. The nucleus has 6 protons and 6 neutrons.

Carbon-14, the radioactive carbon used in dating old bones is another isotope of carbon. The nucleus has 6 protons and 8 neutrons.

Answer 4

One of two or more species of atoms of a chemical element having nuclei with the same number of protons but different numbers of neutrons. They have the same atomic number and hence nearly identical chemical behaviour but different atomic masses. Most elements found in nature are mixtures of several isotopes; tin, for example, has 10 isotopes. In most cases, only stable isotopes of elements are found in nature. The radioactive forms break down spontaneously into different elements (see radioactivity). Isotopes of all elements heavier than bismuth are radioactive; some occur naturally because they have long half-lives
Several forms of spectroscopy rely on the unique nuclear properties of specific isotopes. For example, nuclear magnetic resonance (NMR) spectroscopy can be used only for isotopes with a nonzero nuclear spin. The most common isotopes used with NMR spectroscopy are 1H, 2D,15N, 13C, and 31P.
Mössbauer spectroscopy also relies on the nuclear transitions of specific isotopes, such as 57Fe.
Radionuclides also have important uses. Nuclear power and nuclear weapons development require relatively large quantities of specific isotopes. The process of isotope separation represents a significant technological challenge.

Answer 5

P32(phosphorous 32), P33, S35 (sulfure 35), or tridium H3).

Answer 6

C14