Its Lead. thick lead shields or badges are used to block radiations.
Lead is most commonly used for protecting people from radioactive substances. For example, if you go to the dentist and they give you an X-ray of your teeth, they will usually give you a lead bib to protect you from the radiation produced by the X-ray. However, carbon (graphite usually) can also be used to shield, but whereas a plate of lead may work it would take a brick of graphite.
Radioactive elements are unstable and will decay into other elements in a decay chain. Non-radioactive elements are stable and won't commence into radioactive decay. Radioactive elements can be found from atomic number 84 onwards.
Nope. Gold is none of those, and is otherwise inert, too. That is why gold is often used for people's tooth crowns, and as electrical contacts in electronics. Gold does not even corrode or "Rust".
The element is oxygen.
Scientist test this by measuring the radioactive decay of Carbon 14 to Nitrogen 14. Good for up to 70,000 years. Since you didn't specify, scientists also measure dead people by liver temperature to figure out how long they have been dead.
Usually lead is used for shielding, however I believe Boron is used to in a sense "neutralize" radioactive material. I believe this was discussed in possible solutions for Fukashima
Lead is most commonly used for this. An example is the lead jacket the put over you when you get an x-ray at the dentists'.
Lead is most commonly used for protecting people from radioactive substances.For example, if you go to the dentist and they give you an X-ray of your teeth, they will usually give you a lead bib to protect you from the radiation produced by the X-ray. However, carbon (graphite usually) can also be used to shield, but whereas a plate of lead may work it would take a brick of graphite.
Thorium can be dangerous, especially when powders are inhaled, because is a radioactive element.
Lead
Lead
Einsteinium is an artificial element, radioactive and probably toxic; toxicological studies don't exist.
The most used is lead.
* Alpha radiation can be stopped by a sheet of card * Beta radiation can be stopped be a few inches of aluminium * Gamma radiation can be stopped by several inches of lead or many feet of concrete.
it is just radioactive ok hesh people
the bottom line is that when smoke gets into the detector, it's electrical current is interrupted, causing the alarm to sound (which im guessing you already knew) I'm not totally sure why the radioactive element (americium-241) has to be in there, but what I DO know (contrary to what the previous poster put) is that the alpha rays produced by the radioactive element are NOT strong enough to escape, and therfore pose NO harm whatsoever to people around it.
the bottom line is that when smoke gets into the detector, it's electrical current is interrupted, causing the alarm to sound (which im guessing you already knew) I'm not totally sure why the radioactive element (americium-241) has to be in there, but what I DO know (contrary to what the previous poster put) is that the alpha rays produced by the radioactive element are NOT strong enough to escape, and therfore pose NO harm whatsoever to people around it.