What are radioactive substance?

Question

What are radioactive substance?

Answer 1

Radio active substance are the most unstable elements as it cannot control its elements namely positrons, neutrinos, protons etc. As these are unstable they emit radiations in the form of alpha, beta and gamma particles.  

It simple means by means of radioactive you can convert iron into silver and gold etc.. but the process is extremely difficult.

The activity of radioactive elements can be carefully used for harnessing nuclear power and atomic power etc.  for generating electricity in a controlled manner.

It is in no way connected to radio waves or FM, SW radio channels .. except for the name "radio"..

Answer 2

O' Mr. Good,

Radioactive Substance is a particular substance, like the Nuclear Source of Potent Power which does reacts to the Photonic and/or Positronic Charges enabling within their own-self the proactivity of the enkindled photonic/positronic-discharge as a host of ensued inter-relativity as a interminable process of its reactionary cyclic-action leading to the predisposive effects...  as being a Creator's Design offered by Nature. [this is been apprehendedly Used & Utilised by the selected few Science-tailors]

On ontological study for Quatum Chromodynamics, you may gather to imbibe a productive mean & measure to understand the language as to "How the Positrons are at work-in-progres being the genesis of the High Energy Photonic Discharge -and/or- the Photons at work-in-progress  being the genesis of a electron-positron annihilation as Positronic Discharges, all-in-all a cyclic principle that rules cosmicism of being a host of inter-activity as a sempiternal process of reactionary activities.

Yes the substance and /or material  and matter that holds itself to be the host of  these abovesaid, are been termed to know nomenclaturely in an aggregative group as "Radioactive Substance"

Trust I'm upto to mark of correct and authentic explications, apart I'm not a Physcist or into Science of Matter.

Answer 3

substances that give off energy in the form of beta or alpha particles as they decay

Answer 4

THOSE SUBSTANCES WHICH ARE CAPABLE OF DISINTEGRATE BY THE EMISSION OF

ALPHA PARTICLES ( HELIUM NUCLEUS & POSITIVELY CHARGED)                or

BETA PARTICLES ( ELECTRON & NEGATIVELY CHARGED)                or

GAMA PARTICLES (ENERGY PARTICLES & NO CHARGE)                  or

POSITRON PARTICLES (POSTIVE ELECTRON)

NEUTRINO PARTICLES ., WERE KNOWN AS RADIOACTIVE SUBSTANCES

Answer 5

The previous answers are partially or totally wrong.  The accepted definition of a "radioactive substance" is "Radioactive substances are materials that emit radiation."

The radiations most comonly referred to are alpha, beta, and gamma radiations, although there are others.  All of these are ionizing radiations that can be hazardous to your health.

Here are some more reliable resources:

http://en.wikipedia.org/wiki/Radioactivi...

http://en.wikipedia.org/wiki/Radiation

http://en.wikipedia.org/wiki/Ionizing_ra...

Answer 6

ones that emit sub-atomic particles... due to instability.

Answer 7

they are materials that emit Alpha, Beta and Gamma radiation. Note that some particles become radioactive later in their decay and naturally are not radioactive, for example Carbon (C)

Answer 8

Those elements which emit radiations.

Answer 9

they emit alpha , beta and gama rays.