Radioactivity
Name: ______________________ Date: ____________
Write the missing letters on the lines to finish each word.
1.
a
p
a
The 1st letter of the Greek ___
2.
p
o
t
o
n
A stable particle with positive charge equal to the negative charge of an electron (plural)
3.
b
e
a
The 2nd letter of the Greek alphabet
4.
e
c
t
r
o
a
g
e
t
c
Pertaining to or exhibiting magnetism produced by ___ charge in motion
5.
g
a
m
A unit of magnetic field strength equal to one-hundred-thousandth of an oersted
6.
r
a
i
a
i
o
Energy that travels in waves or particles
7.
h
l
u
m
A very light colorless element that is one of the six inert gasses
9.
p
a
e
A material made of cellulose pulp derived mainly from wood or rags or certain grasses
10.
e
l
c
t
o
An elementary particle with negative charge
11.
n
u
c
l
s
Center of an atom or a cell
12.
a
u
m
n
i
m
A silvery ductile metallic element found primarily in bauxite
14.
l
e
d
A soft heavy toxic malleable metallic element
15.
a
b
s
r
b
To take up mentally
16.
h
a
l
f
-
l
The time required for something to fall to ___ its initial value
17.
n
e
t
o
s
An elementary particle with 0 charge and mass about equal to a proton (plural)
18.
c
r
g
e
An impetuous rush toward someone or something