developed to produce i -+

Lic

the critical material for».
The process of the sr.

i
ttior

"2
°

-

7

impossible to imagine, under: tan:, of
«

6:

in

the

is capable of flattening buildings

anc

potential energy which,
bomb,

of square miles;

when

released

"mited States,

"Fas. er," 15 nearly

Troms,

smell, touch, or hear because they are

hs

previ te

tick we cannot see,

save a fantastic amount of
© r- of an explosion of a single
© corching earth over hundreds

of killing and maiming millicns of reople

immediately,

and

more millions in the near and distant future.
In effect, however, the basic power of the atomic homb comes from two
things:

the force which binds the atom together and a chain reaction,

Even

though atoms are very tiny, the amount of force binding the atom and its
parts together is very great for its size,

When a neutron strikes a

fissionable atom, the atom may split, and following the splitting, may
produce additional neutrons,

In turn, these neutrons may produce splitting

of nearly fissionable atoms,

A chain reaction is said to exist when the

which in turn set off still more, until all have been sprung.

When this chain

controlled, it can be used for electricity-generating

atomic power plants.

The reaction heats water and turns it into steam, which

The tremendous relative energy contained by fissionahle material

a

,.

4

ee

the

t

tL

—-

as opposed to regular sources of energy might be illustrated this way:

10

—

explosion,

&

When, however, this reaction is "uncontrolled," it results in an atomic

Sena!

drives turbines connected to generators, which produce electricity.

»

h

reaction is slow and

ae

The ball trips one mouse trap, which in turn sets off its neighbors,

,

balls.

perce

into a room in which the floor is covered by mouse traps set with ping pong

i beh g

1

An example of a "chain reaction" is where a hall is tossed

Som——Fath——

nearby atom.

so!

+

splitting of one atom produces on an average the splitting of more than one

Select target paragraph3