Radio active decay and half-life

Question 1

Ionising radiation

Answer 1

Radiation that can remove an electron from an atom, producing heavy POS ion.

Question 2

Alpha radiation

Answer 2

stream of particles consisting of two protons and neutrons emitted from nucleus.

Question 3

Beta positive radiation

Answer 3

stream of energetic positrons emitted from the atomic nucleus during decay.

Question 4

Beta negative radiation

Answer 4

stream of particles emitted from the nucleus that are identical to electrons.

Question 5

Gamma radiation

Answer 5

electromagnetic radiation of extremely short wave length and high frequency.

Question 6

Alpha decay

Answer 6

An emission of 2 protons and 2 neutrons from the parent nucleus.

Question 7

Beta negative decay

Answer 7

emission of beta negative particles (electrons) from the parent nucleus.

Question 8

Beta positive decay

Answer 8

emission of beta positive particles (protons) from the parent nucleus.

Question 9

Gamma decay

Answer 9

a form of radioactivity in which the nucleus is atomically unstable, emitting gamma radiation.

Question 10

Half-life

Answer 10

time taken for half the radioactive atoms in a sample to decay.