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Instructions for Side by Side Printing
  1. Print the notecards
  2. Fold each page in half along the solid vertical line
  3. Cut out the notecards by cutting along each horizontal dotted line
  4. Optional: Glue, tape or staple the ends of each notecard together
  1. Verify Front of pages is selected for Viewing and print the front of the notecards
  2. Select Back of pages for Viewing and print the back of the notecards
    NOTE: Since the back of the pages are printed in reverse order (last page is printed first), keep the pages in the same order as they were after Step 1. Also, be sure to feed the pages in the same direction as you did in Step 1.
  3. Cut out the notecards by cutting along each horizontal and vertical dotted line
To print: Ctrl+PPrint as a list

19 notecards = 5 pages (4 cards per page)

Viewing:

Physical Science: Nuclear

front 1

radiation

back 1

energy that comes from a source in the form of waves/rays that you cannot see

front 2

nucleus

back 2

center of an atom

front 3

half-life

back 3

the time it takes for half of a radioactive atom undergo radioactive decay

front 4

radioisotope

back 4

an element that has an unstable nucleus

front 5

radioactive decay

back 5

emission of energy as electromagnetic waves or as moving subatomic particles

front 6

Ionizing radiation is

back 6

considered the most harmful

front 7

During a nuclear reaction, unstable nuclei release ____ of energy

back 7

lots

front 8

During a nuclear reaction, unstable nuclei try and become _____ stable.

back 8

More

front 9

When is radiation most dangerous

back 9

when its ingested

front 10

Which ray has the least amount of penetrating power

back 10

alpha

front 11

Which ray is stopped by lead?

back 11

Gamma

front 12

40 20Ca --> _____ + 0 -1e

back 12

40 21Sc

front 13

0 -1e

back 13

beta

front 14

4 2He

back 14

Alpha

front 15

1 0n

back 15

neutron

front 16

What is the half-life of the graph?

back 16

~3.4

front 17

What percentage was left after 11,400 years?

back 17

25%

front 18

How much time passed after 5% of the substance was left?

back 18

22,800 years

front 19

True or False.

As the number of half-lives increase, the total number of atoms that exist decreases.

back 19

False. They turn into a different substance but still exist.