Calcium isotopes

CALCIUM

ANSWER ME!

1. Rank these foods by their calcium

content (highest to lowest)

SARDINES TOFU MILK

CORRECT ANSWER

382 mg 176 mg 125 mgsardines, tofu, milk

2. Rank the fat content of the following

animals' milk (highest to lowest)

HOODED SEAL BLACK RHINOCEROS

HUMAN

CORRECT ANSWER

hooded seal, human, black rhinoceros

Hooded seals have the fattiest milk (60%) while black rhinoceroses have the skimmest (0.2%).

3. What percent of people are lactose

intolerant?

20% 70% 60% 40%

CORRECT ANSWER

About 70% of people can't produce lactase after childhood.

4. How much calcium does a teen our

age need?

1125 mg

1730 mg

1500 mg

1300mg

CORRECT ANSWER

1300 mg is the daily recommended value.

5. What is special about the casu

marzu cheese?

CORRECT ANSWER

They put insect larvae in it giving it the nickname "maggot cheese".

ISOTOPES OF CALCIUM

ISOTOPES OF CALCIUM

CALCIUM

● has 24 isotopes ● 5 stable isotopes and 19 radioactive

isotopes exist ranging from 34Ca to 57Ca

FACTS ABOUT CALCIUM

Calcium is a soft silvery metal at room temperature.

Calcium burns with a bright orange-red flame in a flame test.

5th most abundant: element in the Earth's crust; dissolved ion in seawater; and element in the human body

FACTS ABOUT CALCIUM

Calcium is never found in this isolated state in nature, but exists instead in compounds.

In 1808, Cornish chemist and inventor Sir Humphry Davy was the first person to successfully isolate calcium.

CALCIUM-40

● A stable isotope containing 20 neutrons● Percentage abundance: 96.941%● It is theorized to actually be a radioactive

isotope with an extremely long half-life (~1021 years) based on its internal structure. No one has ever detected a decay of a calcium-40 atom.

CALCIUM-42● A stable isotope containing 22 neutrons● Percentage abundance: 0.647%● Calcium 42 Carbonate● It is both naturally occurring and produced by fission. ● Calcium Carbonate is also available in ultra high purity

and as nanoparticles. For the thin film applications it is available as rod, pellets, pieces, granules and sputtering targets and as either an ingot or powder.

CALCIUM-43

● A stable isotope containing 23 neutrons ● Percentage abundance: 0.135%● Both naturally occurring and produced by

fission● It is also available in ultra high purity and as

nanoparticles.● Calcium Carbonate 43 isotopic material is

generally immediately available.

CALCIUM-44

● A stable isotope containing 24 neutrons

● Percentage abundance: about 2%● Appears as a white powder● Melting point of 800oC● Insoluble in water

CALCIUM-46

● A stable isotope containing 26 neutrons ● Percentage abundance: 0.004% (rare stable

isotope)● It is theoretically unstable and could be

radioactive. No one has ever observed the decay of a calcium-46 atom.

● It is used in making calcium-47.

ISOTOPES OF CALCIUM

Calcium Isotopes (mainly Ca-42, Ca-44, Ca-46 and Ca-48) are used extensively in clinical research and mainly in nutritional studies. They are used to measure calcium absorption mainly in women and children. In adults, calcium deficiency is strongly related to increasing severity of osteoporosis. In children, calcium deficiency is primarily related to the development of rickets.

REFERENCES

https://www.americanelements.com/calcium-42-carbonate-isotope

https://www.mydietmealplanner.com/calorie-counter/cheese-milk-

and-dairy/yogurt/calcium-in-yakult-yogurt-drink.html

https://en.wiktionary.org/wiki/calcium-42

https://www.google.com.ph/search?q=calcium+content+of+TOFU&

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540.0.18884.5.5.0.0.0.0.160.316.0j2.2.0....0...1.1.64.serp..3.2.316.

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