WEDNESDAY Practive

Front

What is the half-life of a substance?

Back

The half-life of a substance is the time required for half of the substance to decay or be eliminated from a system.

Front

If 10 mg of iodine-131 is given to a patient, how much is left after 24 days? (Half-life = 8 days)

Back

1.25 mg

Front

Convert 5.6 kg to grams.

Back

5600 g

Front

What two types of measurements make up density?

Back

Mass and Volume

Front

Calculate the density of a rock with a mass of 14g and a volume of 2cm³.

Back

7 g/cm³

Front

What is the area of the atom where protons and neutrons are found?

Back

Nucleus

Front

Define density in terms of mass and volume.

Back

Density is defined as mass per unit volume, typically expressed in g/cm³.

Front

What is the formula for calculating density?

Back

Density = Mass / Volume

Front

What happens to the amount of a radioactive substance after one half-life?

Back

The amount of the substance is reduced to half its original quantity.

Front

How do you convert kilograms to grams?

Back

Multiply the number of kilograms by 1000.