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Why cant you add the average masses of each of the isotopes and divide to get overall average of the atoms?
Because the isotopes do not appear in equal amounts. This is hardly surprising since many isotopes experience radioactive decay and change to other elements after decay while stable isotopes persist - thus stable isotopes will usually dominate as the most common isotopes for individual elements with those with the longest half-lifes being more common than those with shorter half-lifes. Of course when you get into the heaviest elements there don't seem to be any stable isotopes so those with longest half life dominate.
Why are some isotopes half-lifes?
Each isotope has a different rate of radioactive disintegration characterized by the half-life, the time necessary to reduce by half the number of atoms.
What do scientists call the time it takes for half of the radioactive atoms to change into daughter elements?
Scientists refer to the time it takes for half of the radioactive atoms to change into daughter elements as the half-life of the radioactive substance.
How many element is half of the periodic table?
including "unknown elements" there are 59 elements in half of the periodic table, not including them there is 55.5 Added: 92 natural elements/2 = 46 natural elements make up 1/2 periodic table.
How do you figure out how many elements are in a compound?
The chemical formula is established after chemical analysis.
Do all elements half half lifes?
yes they do
How are tracer elements used in a variety of ways?
They can be used in estimating the age of an object by measuring its half lifes.
Why cant you add the average masses of each of the isotopes and divide to get overall average of the atoms?
Because the isotopes do not appear in equal amounts. This is hardly surprising since many isotopes experience radioactive decay and change to other elements after decay while stable isotopes persist - thus stable isotopes will usually dominate as the most common isotopes for individual elements with those with the longest half-lifes being more common than those with shorter half-lifes. Of course when you get into the heaviest elements there don't seem to be any stable isotopes so those with longest half life dominate.
How many half lifes will there be?
we know there will be an epiode 3 but we dont know anything else
What are lifes 6 key elements?
NCHOPS - Nitrogen, Carbon, Hydrogen, Oxygen, Phosphorus, Sulfur
Why are some isotopes half-lifes?
Each isotope has a different rate of radioactive disintegration characterized by the half-life, the time necessary to reduce by half the number of atoms.
Is miley alive?
Well yes but she has two lifes so half real half not
What is the half-life of the element that registers 360 counts per hour and 18 hours later the rate becomes 45 counts per hour?
After 3 half lifes there will 45 counts per hour (360 -> 180 -> 90 ->45). Therefore 3 half lifes equals 18 hours. One half life is therefore 6 hours.
What is the descriptive name for a figure in heraldry half horse half sea horse?
A hippocampus was a half horse and half sea horse figure.
When a figure shows one half as a mirror image of the other half?
Then the figure has line symmetry.
Do all elements have a half-life?
No, not all elements have a half-life. Half-life is a property of radioactive elements that undergo decay over time. Non-radioactive elements do not have a half-life because they do not decay in the same way.
How much parent and daughter material will be left after two half lifes?
Only 25 % remain from the initial isotope.
