Atomic Theory, Isotopes And Radioactive Decay

Front 1

Radioactivity

Back 1

Radioactivity is the release of high-energy particles and raise of energy from a substance as a result of changes in the nuclei

Front 2

Natural background radiation

Back 2

The stream of high energy fast-moving particles or Waves that is found in our environment is called natural background radiation

Front 3

Radiation

Back 3

Radiation The first two high energy Reyes and particles committed by a radioactive sources

Front 4

Types of radiation

Back 4

Radiation includes radio waves microwaves inspired very visible light and ultraviolet rays

Front 5

Light

Back 5

Light is one form of radiation that is Visible to humans

Front 6

Isotopes

Back 6

Are different different atoms of a particular element that have the same number of protons but different number of neutrons

Front 7

Mass number

Back 7

The mass number is en internet while number that represents the sum of an atoms protons

Front 8

Radioactive decay

Back 8

Is the process in which unstable nuclei lose energy by emitting radiation.

Front 9

Radioisotopes

Back 9

Isotopes that are capable of radio active decay are called ^

Front 10

Alpha particles

Back 10

Are positive charged atomic particles that are much more massive than either beta particles as the nucleus of a helium atom.

Front 11

Alpha decay

Back 11

The emission of an alpha particle from a nucleus is a process called alpha decay

Front 12

Beta particle

Back 12

Is an electron that has a mass number of 0. Has an electric charge of 1-. They are both lighter and fast moving. They have a greater penetrating power than alpha particles.

Front 13

Beta decay

Back 13

A neutron changes into a proton and an electron. During the beta decay the proton remains in the nucleus while the electrons shoots out from the nucleus with a lot of energy.

Front 14

Gamma radiation

Back 14

Consist of rays of high energy short wave length radiation. No mass and no charge. The release of gamma radiation does not change the atomic number or the mass number of a nucleus

Front 15

Gamma decay

Back 15

Results from a redistribution of energy within the nucleus. A high energy gamma ray is given off as the isotope falls from a high energy gamma ray to a low state.