Radioactive Decay

Of course they are more stable, therefore they formed naturally.

The decay is:
Bi-187------------------Tl-183

In radiocarbon dating, the carbon-14 levels in the object being dated are compared with _____.

We commonly see an isotope of americium generating alpha particles to ionize air in smoke detectors. A source generates alpha particles to ionize air in industrial settings so that the ionized air will quickly and effectively dissipate static charges. A radio pharmaceutical generates alpha particles, and the unsealed source irradiates tumors in patients that are so implanted. We find alpha particle sources in the physics lab where they are used in experiments and demonstrations. Alpha particles can be accelerated for use as "atomic bullets" in high energy physics research.

A radiac detects nuclear radiation. There are many types of radiac, some are: Geiger counter, ionization survey meter, scintillation counter, film badge dosimeter, electroscope dosimeter, electrometer, drift meter, cloud chambers, etc.

Xenon-135 decay to caesium-135 by beta emission.

227Ac----- alpha decay---- 223Fr

"The radioactive decay of certain unstable isotopes is used to calculate the age of objects."

The half life is different for each isotope of plutonium; name the isotope for a calculation.

6C14 ---------> 7N14 + -1 e0

Beta particle is emitted and carbon changes into nitrogen

• The decay mode of Ca-37 is β+ therefore, Ca-37 transmutes naturally into K-37 by giving off a positron.

  20Ca37 → 19K37 + +1e0

• Calcium (Ca) has a total of 24 isotopes, from 34Ca to 57Ca. There are five observationally stable isotopes (40Ca, 42Ca, 43Ca, 44Ca and 46Ca), plus one isotope (48Ca) with such a long half-life that for all practical purposes it can be considered stable.

Copper-67 undergoes beta decay with a halflife of 59 hours, becoming stable Zinc-67.

You need to specify not just the element, but the specific isotope. Like most elements, selenium comes in several varieties, which in this case are called isotopes.

Caebon-14 is a radioactive isotope and can decay.

Actually there is a mode of radioactive decay which involves an atomic electron. It is called electron capture and results in the atomic number Z decreasing by 1 and the mass number A remaining the same. This happens in nuclei which have a deficiency of neutrons. No ion is formed, but a K or L x-ray can be emitted in addition to a neutrino and possible gamma rays.

The two types of radioactive decay are alpha and beta. Generally, in alpha decay the nucleus will lose 2 protons and 2 neutrons (it's a helium nucleus). Beta decay involves a neutron losing an electron and becoming a proton, so the atomic mass remains the same, but the atomic number increases by one since there is another proton.

The nucleus is too large to be stable. There is the theory of grouping of nucleons into alpha particles inside the nucleus and thru oscillations of the nucleus one of these on one end of the nucleus can be repelled with a great enough force to push it out of the nucleus.

Marie Sklodowska-Curie

Gamma radiation isn't a form of decay as it doesn't create a new atom but gamma radiation is an electromagnetic wave.

Is the process by which the atomic nucleus becomes slightly smaller, as a result of the emission of particles, electromagnetic radiation, or both. ELECTROMAGNETIC FORCE is the right answer

That depends on the nuclear decay type. For gamma decay, the identity does NOT change, but for alpha and beta, it does.

0.02 kg

No. Carbon dating only works on organic matter.

Radium emits alpha, beta, and gamma radiation.

Alpha radiation is fully ionized helium nuclei. Beta radiation is high energy electrons. Gamma radiation is very high energy electromagnetic radiation. All of these can do significant damage to living things.

Each isotope has another half life.