Close

## How do you calculate the half life of cesium-137?

놀를 = Page 2 [2] (5 points total) The half-life of cesium-137 is 30 years. Suppose we have 100-mg sample. a) (2.5 points) Find a formula for the mass remaining after t years. Plt) = cekt p(30)=50 by half-life c=100.

2.6 minutes

## How long is the half life of cesium-137 in millions of years?

Cesium-137 has a radioactive half-life of about 30 years and decays by beta decay either to stable barium-137 or a meta-stable form of barium (barium-137m).

2.0648 y

## Why is Caesium 137 so dangerous?

Cesium-137 is an especially dangerous fission product because of its high yield during fission, moderate half-life, high-energy decay pathway, and chemical reactivity. Because of these properties, cesium-137 is a major contributor to the total radiation released during nuclear accidents.

∼2 years

55

## What does cesium mean?

: a metallic chemical element that is the most electropositive element known and that is used in photoelectric cells, in atomic clocks, and as a component of drilling fluid — see Chemical Elements Table.

## Where is cesium found in the world?

Source: Cesium is found in the minerals pollucite and lepidolite. Commercially, most cesium is produced as a byproduct of the production of lithium metal. More than two-thirds of the world’s reserves of Cesium – 110,000 tonnes – are found at Bernic Lake, Manitoba, Canada.

## What happens if you eat cesium?

HIGHLIGHTS: Exposure to stable or radioactive cesium occurs from ingesting contaminated food or drinking water or breathing contaminated air. High levels of radioactive cesium in or near your body can cause nausea, vomiting, diarrhea, bleeding, coma, and even death.

## Where is cesium used?

The most common use for caesium compounds is as a drilling fluid. They are also used to make special optical glass, as a catalyst promoter, in vacuum tubes and in radiation monitoring equipment. One of its most important uses is in the ‘caesium clock’ (atomic clock).

## Is cesium used in bombs?

The most likely radioactive element in a dirty bomb is cesium-137, according to Phil Anderson, a senior fellow at the Center for Strategic and International Studies. Cesium-137 is used to treat cancer and to maintain accurate atomic clocks.

## Is Cesium a rare earth metal?

Cesium is a silvery gold, soft, alkali metal and is one of five metals that is liquid at or near room temperature. Cesium is a very rare element, mostly found in unusual, highly evolved granitic pegmatite rocks in form of the mineral pollucite and in certain brines.

## Is Lithium a rare earth metal?

Although lithium is widely distributed on Earth, it does not naturally occur in elemental form due to its high reactivity. According to the Handbook of Lithium and Natural Calcium, “Lithium is a comparatively rare element, although it is found in many rocks and some brines, but always in very low concentrations.

## Does the human body use scandium?

Scandium has no biological role. Only trace amounts reach the food chain, so the average person’s daily intake is less than 0.1 microgram. Scandium can be a threat to the liver when it accumulates in the human body.

## Can scandium rust?

scandium can’t rust Unless the alloy contains iron, it can’t, by definition, rust. It may corrode, but not rust.

## Why is scandium useful?

Scandium is mainly used for research purposes. It has, however, great potential because it has almost as low a density as aluminium and a much higher melting point. An aluminium-scandium alloy has been used in Russian MIG fighter planes, high-end bicycle frames and baseball bats.