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A radioactive element has a half-life of 2000 years. If a sample of this element begins with a mass of 100 grams how long would you have to wait for the mass to decrease to 25 grams?
Wiki User
∙ 7y ago
You would have to wait 6,000 years for this to occur, because it requires twice the half-life to reduce the radioactive isotope to 1/4 of its original mass.
Wilton Blanda
Camila Kling
4000 years
Wiki User
∙ 13y agoYou would have to wait 6,000 years for this to occur, because it requires twice the half-life to reduce the radioactive isotope to 1/4 of its original mass.
Wiki User
∙ 10y ago4000
Alexa Rodriguez Orne...
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How are the elements with atomic numbers 43 and 61 are unique?
The element with atomic numbers 43 (Technetium) and 61 (Promethium) are unique because they are the only radioactive elements before the start of the bulk of the radioactive elements. The bulk of the radioactive elements begins at atomic number 84 (Polonium). These are significant as they aren't primordial and are only found due to radioactive decay.
What search begin the search with the first array element?
The search for the first array element begins at the assembly plant. As they array is being constructed, the element itself is one of the first components to be completed.
What is the sign or abbreviation to represent an element?
The sign or abbreviation to represent an element is called an "atomic symbol", and there is a distinct one for each element. Every atomic symbol begins with a capital letter, which may constitute the entire symbol but is usually followed by a lower case letter.
What are the three letters of the alphabet that are not used as the starting letter in the name of an element what are they?
In English, no element name begins with the letter J, Q, or W. The symbol for tungsten is W, from its name in some other languages (wolfram).
What element begins with be?
The element with the chemical symbol Be is Beryllium. Beryllium is in Group 2 of the Periodic Table and, so, is an Alkaline Earth Metal. It has 2 electron shells, with 2 electrons in the outer shell and 2 in the inner shell.
A radioactive element has a half-life of 3000 years. If a sample of this element begins with a mass of 60 grams how long would you have to wait for the mass to decrease to 15 grams?
You would have to wait 6,000 years for this to occur, because it requires twice the half-life to reduce the radioactive isotope to 1/4 of its original mass.
Is there an element that begins with Q?
No chemical element begins with the letter Q.
Energy is produced in nuclear power plants from the controlled fission of?
U-235 isotope. (That is, of Uranium. It is a radioactive element.) The atoms are stocked in fuel rods, and the fission begins!
How are the elements with atomic numbers 43 and 61 are unique?
The element with atomic numbers 43 (Technetium) and 61 (Promethium) are unique because they are the only radioactive elements before the start of the bulk of the radioactive elements. The bulk of the radioactive elements begins at atomic number 84 (Polonium). These are significant as they aren't primordial and are only found due to radioactive decay.
What happens when dehydration begins to occur?
The salivary secretions decrease
Does any element start with a w?
No chemical element begins with the letter W.
What two elements start with X?
Only one chemical element begins with the letter X. Xenon is a chemical element. It has the symbol Xe. It is the only chemical element that begins with the letter x.
What metalic element starts with n?
Nickel is a metallic element. It begins with the letter n.
What super element begins with k?
· Krypton (Kr)
What liquid element begins with b?
Bromine is a liquid element. It has the symbol Br in the Periodic Table.
What is an isotope that gives off radiation which begins with radio.?
I'm pretty sure they are called radioactive isotopes.
What is a 7 letter word that means to shrink or decrease that begins with the letters dw?
dwindle
