mention the properties of invisible rays emitted from the radioactive elements
Answers
Answer:Property α ray β ray
Nature Positive charged particles, 2He4nucleus Negatively charged particles (electrons).
Charge +2e –e
Mass 6.6466 × 10–27 kg 9.109 × 10–31 kg
Range ~10 cm in air, can be stopped by 1mm of A l Upto a few m in can be stopped~cm of A l
Explanation:
Answer:
RADIOACTIVITY
RADIOACTIVITY
All the elements having atomic number greater than 82 emit invisible radiation all the time. The phenomenon of emission of these powerful rays is called "Natural Radioactivity" and the element that emits such rays is called "Radio Active Elements".
TYPES OF RADIO ACTIVE RAYS
There are three types of radioactive rays:
a-Rays
b-RAYS
g-RAYS
PROPERTIES OF a-RAYS
NATURE: a - rays consist of α particle. Each α particle consists of 2He4 nucleus.
CHARGE: a - particle carry positive charge.
MASS: Mass of each a - particle is 4 times that of a proton or H-atom.
IONIZATION: Ionization power of a - rays is very high.
PENETRATION POWER: Penetration power of a - rays is very small.
FLUORESCENCE: a - rays produce fluorescence in different substances.
EFFECT ON HUMAN BODY: a - rays produce burn and source on human body.
ARTIFICIAL RADIO ACTIVITY: a - rays can produce artificial radioactivity is certain nuclei.
IONIZATION CAPABILITY : They have strong ionizing power because they remove electrons from the atoms of gas through which they pass.
VELOCITY: Their velocity range is 3 x 107 m/s to 3 x 106 m/s.
PROPERTIES OF b-RAYS
NATURE: b - rays consist of fast moving electrons.
CHARGE: b - rays have negative charge.
VELOCITY: Velocity of b - rays is from 9 x 107 m/sec to 27 x 107 m/sec.
EFFECT ON PHOTO GRAPHIC PLATE: b - rays affect the photo graphic plate.
IONIZTION POWER: Ionization power of b - rays is very small.
KINETIC ENERGY: Kinetic energy of b - rays is less than that of a - rays.
FLUORESCENCE: b - rays produce fluorescence in different substance.
PROPERTIES OF g-RAYS
NATURE: g - rays are electromagnetic radiations.
CHARGE: g - rays are no charge.
VELOCITY: g - rays travel with the velocity of light that is 3 x 108 m/sec.
PENETRATION POWER: Penetration power of g - rays is very large. It is about hundred times larger than that of b -rays.
FLUORESCENCE: g - rays produce feeble fluorescence When incident on screen coated with barium platino cyanide.