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Half-life
What else can I help you with?
What substances that do not dissolve easily in water?
you know water is a polar substance and can solve only polar substances and ionic substance it is not able to solve fat , oil or other organic (usually) substances (oil). by ionic substance I meant substances such as salt
How do you know if something is radioactive?
You can detect radioactivity using a Geiger counter or other radiation detectors. Radioactive materials emit ionizing radiation such as alpha, beta, or gamma particles, which can be measured to determine the level of radioactivity. Additionally, certain properties like half-life and decay products can also indicate if a substance is radioactive.
A substance that undergoes a chemical change is still the same substance after the change?
i want to know the answer.............................................................................................................................................................................. .................................................................................................................................. ................................................................................................................................................ .................................................................................................................................................... ................................................................................................................................. ...................................................................................................................................... but I don't!
What is unknown substances?
Unknown substances are materials whose composition or properties are not readily identifiable or known. These substances may require analysis or testing to determine their characteristics, which can help determine their potential uses or hazards. It is important to handle unknown substances with caution until their nature is determined.
Ability of a substance to react chemically?
reactivity, the tendency of an element to react with another substance is know n as its reactivity. the more the capacity of an element to react with another substance the more will be its reactivity, the series of elements arranged in their decreasing reactivity is known as reactivity series.
What elements are used in radioactive dating?
don't know
What happens during radioactive dating?
Radioactive dating is carried out with substances which were formed at some unknown point in the past and contained a known proportion of a radioactive isotope of some element. Radioisotopes decay into other elements at a fixed and known rate. So, if you know how much of the radioactive isotope is still left in the sample, then you can work out how long it would have taken for the rest to have decayed into other elements. That gives the age of the sample.
What does radioactive dating allow scientists to determine?
To know about the age of relics.
Does the model of decay accurately represent the decay of a radioactive subsatnce?
If we are dating a substance on unknown age, no, this is because, we are assuming we know how much substance was initially present, also we assume there has been no contamination, lastly we assume the decay rate has always been the same.
How can radioactive dating show the absolute rock age?
the half life of the radioactive substance is used to determine the mass lost over a period of time. For example rubidium 85 has a half life of 10.756 years, therefore if you had 1kg of Rubidium 85 in 10.756 years it mass will have decreased to 0.5kg due to the radioactive decay. providing the half life of the material is know we can work out the age by seeing how much it had decayed
If 20 of a radioactive substance disappears in 70 days what is its half life?
we need to know the units of 20. Is it grams, kilograms, %...
What substance is made when water is added to quicklime?
I would like to know what important substances that can be made from Quicklime?
What you used to find the mass of materials and substances?
if you know the specific gravity and the volume of the substance you can find the mass.
What is the comparison between Rene Descartes' and John Locke's theory of substance?
Descartes had a dualist substance theory and believed that there were two substances, the mind and the body. Locke also believed that there were spiritual substances and physical substances, but his theory of substance relied on the substratum, a characterless thing that contains the characteristics we observe. Since we cannot observe substance, Locke believed we could not know anything about it.
When sugar and salt are mixed together the properties of the final substance s are those of the the beginning substances?
Nice to know...
How old is the the earth and how did scientist know?
The Earth is approximately 4.54 billion years old. Scientists determine the age of the Earth through various methods, including radiometric dating of rocks and meteorites, studying the decay of radioactive isotopes, and analyzing the composition of minerals.
Can you convert 0.5 mg to ml?
Yes, if you know the density of the substance. Different substances have different densities, i.e., different amounts of mass per volume. mg is a measure of mass, ml is a measure of volume.Yes, if you know the density of the substance. Different substances have different densities, i.e., different amounts of mass per volume. mg is a measure of mass, ml is a measure of volume.Yes, if you know the density of the substance. Different substances have different densities, i.e., different amounts of mass per volume. mg is a measure of mass, ml is a measure of volume.Yes, if you know the density of the substance. Different substances have different densities, i.e., different amounts of mass per volume. mg is a measure of mass, ml is a measure of volume.
