isotopes 2.0

Question 1

define isotope

Answer 1

different atoms of same element which have the same number of protons and electrons but a different number of neutrons
atoms of the same element which have the same atomic number but different mass number

Question 2

example of isotope

Answer 2

carbon 12
carbon 13
carbon 14

chlorine 35
chlorine 37

Question 3

define radioactive isotope

Answer 3

some isotopes have unstable nuclei
emit particles and radiation from this nuclei to become more stable

Question 4

date organic remains from archaeological remains

Answer 4

carbon 14

Question 5

radiotherapy

Answer 5

cobalt 60
iodine 131 for thyroid cancer
iridium 192 implants for head and breast cancer

Question 6

pain relief

Answer 6

strontium 89
rhenium 186

Question 7

tracers

Answer 7

molybdenum 99 used to image skeleton and heart muscle in particular but also brain and most other organs
chromium 51 used to label red blood cells
iodine 131 used for imaging thyroid

Question 8

energy generation

Answer 8

uranium 235
plutonium 239

Question 9

pacemakers

Answer 9

plutonium 238