Radioactivity
Name: ______________________ Date: ____________
Write the letter of the matching definition next to each term.
1. alpha
A. A mixture of gases required for breathing
2. protons
B. A unit of magnetic field strength equal to one-hundred-thousandth of an oersted
3. beta
C. An elementary particle with negative charge
4. electromagnetic
D. A particle that is electrically charged
5. gamma
E. The 1st letter of the Greek ___
6. radiation
F. An impetuous rush toward someone or something
7. helium
G. To take up mentally
8. ion
H. A silvery ductile metallic element found primarily in bauxite
9. paper
I. An elementary particle with 0 charge and mass about equal to a proton (plural)
10. electron
J. The time required for something to fall to ___ its initial value
11. air
K. A soft heavy toxic malleable metallic element
12. nucleus
L. The 2nd letter of the Greek alphabet
13. aluminium
M. A material made of cellulose pulp derived mainly from wood or rags or certain grasses
14. lead
N. Center of an atom or a cell
15. absorbed
O. A very light colorless element that is one of the six inert gasses
16. half-life
P. A stable particle with positive charge equal to the negative charge of an electron (plural)
17. neutrons
Q. Pertaining to or exhibiting magnetism produced by ___ charge in motion
18. charge
R. Energy that travels in waves or particles