Radiation Flashcards
(29 cards)
What does radioactive decay involve?
Changes in the nuclei of atoms.
How can unstable nuclei become more stable?
By giving out alpha , beta, or gamma radiation.
What does an alpha particle look like?
4 2+
He
2
What does a beta particle look like and what do they release?
0
e
-1
High energy electrons released
What is emitted from gamma rays?
A high energy wave (or ray)
What name is given to the electrons which are emitted from the nucleus
of certain radioactive atoms?
Beta radiation.
What name is given to the particles consisting of 2 protons and 2 neutrons?
Alpha radiation.
What name is given to the electromagnetic radiations of a very short wavelength?
Gamma radiation.
Which is the most penetrating radiation?
Gamma radiation.
Which is the least penetrating radiation?
Alpha radiation.
Which radiation is attracted by a positive electric field?
Beta radiation.
Which radiation is attracted by a negative electric field?
Alpha radiation.
Which radiation passes through an electric field without deflection?
Gamma radiation.
What radiation is represented by:
0
e
-1
Beta radiation.
What radiation is represented by:
4 2+
He
2
Alpha radiation.
Which radiation has no mass associated with it?
Gamma radiation.
Which radiation is a pure form of energy?
Gamma radiation.
The stability of the nucleus of an ion depends on the ratio of:
neutrons : protons
Which change is associated with beta emission?
Atomic number increases.
Mass number doesn’t change.
Which change is associated with alpha emission?
Atomic number decreases.
Mass number decreases.
Which change is associated with gamma emission?
Atomic number doesn’t change.
Mass number doesn’t change.
Does this nuclear reaction envolve alpha emission or beta emission?
23 23
Na —> Mg
11 12
Beta emission.
Does this nuclear reaction envolve alpha emission or beta emission?
238 234
Na —> Mg
92 90
Alpha emission.
What element is formed when an atom of radium emits a beta particle?
Actinium.
