Science- Yr 10 Chemistry

Front 1

test for carbon dioxide

Back 1

limewater goes milky

Front 2

test for H2O (water)

Back 2

cobalt chloride paper goes from pink to blue

Front 3

test for H2 (hydrogen)

Back 3

lighted splint pops

Front 4

Combustion equation

Back 4

fuel+oxygen-->carbon dioxide+water

Front 5

Decomposition of water equation

Back 5

2H2O-->2H2 + O2

Front 6

What is decomposition?

Back 6

The breaking down of a compound into simpler forms

Front 7

Name 3 radioactive isotopes with medical uses

Back 7

Fluorine -18, Iodine -131 and Technicium -99m

Front 8

What are the uses, benefits and problems of Fluorine -18? Medical or Industrial uses? Alpha, beta or gamma?

Back 8

Medical. Gamma rays.
Uses: tagged to glucose & used up in cells that use glucose e.g. brain and cancer cells, to diagnose abnormal activity in a PET scan.
Benefits: improved detection and management of brain problems and cancer. Can save lives.
Problems: can be dangerous to staff/user, disposal problems

Front 9

What are the uses, benefits and problems of Iodine -131? Medical or Industrial uses? Alpha, beta or gamma?

Back 9

Medical. Gamma rays. Uses: patient drinks tagged with sodium iodide- goes through digestive system via thyroid.
Benefits: avoids exploratory surgery, relatively low cost, no hospitalisation, early diagnosis
Problems: can be dangerous to staff/user, can further imbalance iodine in the thyroid

Front 10

What are the uses, benefits and problems of Technetium -99m? Medical or Industrial uses? Alpha, beta or gamma?

Back 10

Medical, gamma.
Uses: tagged to phosphate, goes to bone to diagnose small fractures and bone cancer
Benefits: early diagnosis
Problems: dangerous to staff/user

Front 11

Name 3 radioactive isotopes used industrially.

Back 11

Cobalt -60, Americum -241, Strontium

Front 12

What are the uses, benefits and problems of Cobalt -60? Medical or Industrial uses? Alpha, beta or gamma?

Back 12

Industrial. Gamma.
Uses: sterilisation of medical supplies and food
Benefits: disease organisms killed, food can be stored longer
Problems: could be health hazards when sterilising food, dangerous to staff

Front 13

What are the uses, benefits and problems of Americum -241? Medical or Industrial uses? Alpha, beta or gamma?

Back 13

Industrial, alpha
Uses: smoke detectors- complete electric circuit which is disrupted by smoke
Benefits: prevent fires
Problems: long 1/2 life therefore disposal problems

Front 14

What are the uses, benefits and problems of Strontium? Medical or Industrial uses? Alpha, beta or gamma?

Back 14

Industrial, beta
Uses: beta particles pass through an object. the amount that passed through are measured to determine thickness.
Benefits: can measure thickness of objects in ground
Problems: disposal, health hazards for users.

Front 15

What is an isotope?

Back 15

isotopes of the same element have different numbers of neutrons= different atomic mass

Front 16

What is Carbon 14 used for?

Back 16

radiocarbon dating- half life

Front 17

What is Cobalt 60 used for?

Back 17

sterilising medical equipment and food

Front 18

What is Technetium -99m used for?

Back 18

radioactive tracer (emits gamma rays)- diagnoses small fractures and bone cancer

Front 19

What are alpha particles? What is their charge? What do they penetrate?

Back 19

helium nuclei- 2 protons and 2 neutrons. Charge is 2+. Penetrate a thin sheet of paper. Good ionising ability.

Front 20

What are beta particles? What is their charge? What do they penetrate?

Back 20

fast-moving electrons. 1-. Penetrate a thin sheet of aluminium.

Front 21

What are gamma rays? What is their charge? What can they penetrate?

Back 21

Part of the electromagnetic spectrum. Move at the speed of light. Small wavelength, high frequency, high energy. Penetrates a thick layer of lead or concrete. No charge.