Natural Radioactivity ch 9

Question 1

the process by in which some atoms emit energy and particles are termed radiation and this happen only in unstable nuclei

Answer 1

radioactivity

Question 2

Nuclear radiation occurs as result of ________in ____________composition or structure

Answer 2

1-alteration
2-nuclear

Question 3

isotope versus nuclide

Answer 3

isotope : same atomic number but different mass
nuclide : atom with atomic number and mass

Question 4

natrual radiation emitted by unstable nuclei such as :

Answer 4

1-alpha
2-beta
3-gamma

Question 5

convert proton to neutron will produce :

Answer 5

postive charge

Question 6

a measure of nuclear stability is the _______

Answer 6

binding energy

Question 7

binding energy

Answer 7

the energy required to break up nucleus to particles like proton and neutron

Question 8

nuclear stability represented as :

Answer 8

ration of neutron to proton

Question 9

all isotope except________has more proton than neutron

Answer 9

H

Question 10

the stability of an isotope is indicated by _________isotope with_______half-life______rapidly

Answer 10

1-half-life
2-short
3-decay

Question 11

energy transformation pathway :

Answer 11

1-nuclear energy : reactor core or red zone carried by water to blue zone or boiler to converted to steam
2-heat energy : steam
3-mechanical energy : turbin
4-electerical energy : electricity

Question 12

nuclear fusion and nuclear fission :

Answer 12

fusion =join togather or result from the combination of two small nuclei to larger nucleus like the sun
fission =spliting from large to small nuclei

Question 13

radition used for treat cancer how ?

Answer 13

high-energy radiation such as gamma passes through a cell and causes lose to electron but also the exposure of healthy cell to gamma can cause cancer so the patient need unusual care

Question 14

medical tracer are small amount of __________substance used as probes to study internal organs

Answer 14

radioactive

Question 15

natural radioactive and artificial radioactive

Answer 15

natural=from unstable isotope
artificial= from stable isotope

Question 16

the process of forming radioactive substance is often accomplished in _______

Answer 16

nuclear reactor

Question 17

measurement of radiation :

Answer 17

1-photographic imaging such as iodine-131
2-computer imaging

Question 18

UNIT of Radioactivity

Answer 18

ci or Bq

Question 19

roentgen

runt gin

ro en tgen

Answer 19

measure of very high energy ioniziation radiation (X ray and gamma )