f3d bd9 a48 65a 95d 5e7 898 6fe 37f f8a 49a 849 273 d35 e46 0a7 921 c31 c2b 6d9 5de 965 2e6 a21 0cd c7a dec b60 a40 1b6 2f8 80c 94d 29b 30b 682 a75 7d3 b1f 5ef a0e 7c3 334 432 ccc 816 cf5 63e 756 1b6 6e0 e22 7e3 7eb 4af 60b 41b faf d02 f2c 394 011 8ab 26e 40d 803 97f f11 f5f 565 914 f13 69f e5a da0 791 f25 dc8 de8 32c eb3 795 2fe b8f 179 753 e6a b12 572 98b 7bc 4d2 531 92c 39d a14 331 a90 004 241
A substance is said to be radioactive if it contains unstable nuclei and is able to naturally release energy in the process of shedding high speed charged particles, in an attempt to reach a stable state. With this, a non-radioactive substance will remain intact indefinitely unless acted upon by an external force.
What makes a radioactive element?
Radioactive elements are made up of atoms whose nuclei are unstable and give off atomic radiation as part of a process of attaining stability. The emission of radiation transforms radioactive atoms into another chemical element, which may be stable or may be radioactive such that it undergoes further decay.
What are the properties of radioactive elements?
Radioactive elements are in an unstable, high-energy state and emit radiation to return to a stable, low-energy state.
What type of elements are radioactive?
The following radioactive elements are found naturally in the environment.
- Alpha Radiation. Alpha radiation is a type of energy released when certain radioactive elements decay or break down. …
- Uranium. Uranium is a radioactive element that can be found in soil, air, water, rocks, plants and food. …
- Radium. …
- Radon. …
- Polonium.
What is not a radioactive element?
The correct answer is Cadmium. Cadmium is not a radioactive element.
What is radioactivity and examples?
Radioactivity is the spontaneous emission of radiation in the form of particles or high energy photons resulting from a nuclear reaction. It is also known as radioactive decay, nuclear decay, nuclear disintegration, or radioactive disintegration.
What are the 4 radioactive elements?
Radioactive Elements
| Element | Most Stable Isotope | Half-life of Most Stable Isotope |
|---|---|---|
| Actinium | Ac-227 | 21.77 years |
| Thorium | Th-229 | 7.54 x 104 years |
| Protactinium | Pa-231 | 3.28 x 104 years |
| Uranium | U-236 | 2.34 x 107 years |
•Jul 30, 2019
What does radioactive mean?
1 : the giving off of rays of energy or particles by the breaking apart of atoms of certain elements (as uranium) 2 : the rays or particles that are given off when atoms break apart. radioactivity. noun. ra·dio·ac·tiv·i·ty | \ -ak-ˈtiv-ət-ē \
Which of the following is not a radioactive particle?
Zirconium is an element with the symbol Zr and the atomic number of Zr is 40. It is a transition metal which is lustrous. It is mainly used as a refractory. It is not radioactive.
What is meant radioactivity?
As its name implies, radioactivity is the act of emitting radiation spontaneously. This is done by an atomic nucleus that, for some reason, is unstable; it "wants" to give up some energy in order to shift to a more stable configuration.
