Chemistry-Radioactivity

Question 1

Isotopes

Answer 1

Atoms of the same element that differ in the number of neutrons. In the element.

Question 2

Stable

Answer 2

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

Question 3

Unstable

Answer 3

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

Question 4

Radioisotopes

Answer 4

A radioactive. Isotope

Question 5

Nuclear radiation

Answer 5

Radiation from the nucleus of an atom, consisting of alpha or beta particles, or gamma rays.

Question 6

Alpha particles

Answer 6

Positively charged nuclei of helium atoms, consisting of two protons no two neutrons.

Question 7

Beta particles

Answer 7

Charged particles that have the same size and mass as electrons

Question 8

Gamma rays

Answer 8

Electromagnetic radiation. Produces in nuclear reactions. No mass. Travel at speed of light.

Question 9

Half-life

Answer 9

Time in which half the radioactive atoms takes to decay, or change into a different element.

Question 10

Cosmic radiation

Answer 10

Naturally background radiation from outer space