Radioactivity

Question 1

Isotopes

Answer 1

Atoms of the same element that differ in the number of neutrons in its nucleus.

Question 2

Stable

Answer 2

Describes a nucleus that does not change spontaneously. The protons and neutrons in the nucleus are held strongly together.

Question 3

Unstable

Answer 3

Describes an atom in which the neutrons and protons in the nucleus are not held strongly together

Question 4

Radioisotopes

Answer 4

An isotope that is radioactive. A radioactive form of an isotope.

Question 5

Nuclear radiation

Answer 5

Radiation from the nucleus or an atom. It is the energy emitted by radioactive substances. It consists of Alpha or Beta particles, or Gamma rays.

Question 6

Alpha particles

Answer 6

Positively charged nuclei of helium atoms. Consists of two protons and two neutrons.

Question 7

Beta particles

Answer 7

Charged particles, either positive or negative, with the same size and mass as electrons.