What is the half-life of a substance?
WEDNESDAY Practive

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Chemistry
•
12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The half-life of a substance is the time required for half of the substance to decay or be eliminated from a system.
2.
FLASHCARD QUESTION
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
3.
FLASHCARD QUESTION
Front
Convert 5.6 kg to grams.
Back
5600 g
4.
FLASHCARD QUESTION
Front
What two types of measurements make up density?
Back
Mass and Volume
5.
FLASHCARD QUESTION
Front
Calculate the density of a rock with a mass of 14g and a volume of 2cm³.
Back
7 g/cm³
6.
FLASHCARD QUESTION
Front
What is the area of the atom where protons and neutrons are found?
Back
Nucleus
7.
FLASHCARD QUESTION
Front
Define density in terms of mass and volume.
Back
Density is defined as mass per unit volume, typically expressed in g/cm³.
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