1. Describe the properties and characteristics of the three principal forms of natural radiation 2. Describe the factors that can be used to predict whether or not a not a nuclide is stable
3. Explain the relationship between the rate of radioactive decay and half-life for a nuclide
4. Determine how much of a substance remains after a given number of half-lives
5. Write nuclear equations for alpha and beta decay, given the parent nuclide
6. Describe nuclear reactions that occur in the 23892U decay series
7. Describe the difference between natural and artificial nuclear reactions
8. Describe what happens to a nucleus when it undergoes fission
9. Discuss the process of nuclear fusion and how it is different from nuclear fission
10. Describe methods that are used to detect radiation
11. Describe the radiation units that are used to measure activity, intensity and dosage
12. Describe the biological effects of high, moderate and low exposure to radiation
13. Describe medical uses for radionuclides
14. Describe CAT scans, PET scans and NMR scans

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure  

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

the product of the pressure and volume is also constant