The five stable isotopes of calcium (Calcium 40,42,43,44,46), its uses, percentage abundance and summary of report.

1. CALCIUM

2. ANSWER ME!

3. 1. Rank these foods by their calcium
content (highest to lowest)
SARDINES TOFU MILK

4. CORRECT ANSWER
382 mg 176 mg 125 mg
sardines, tofu, milk

5. 2. Rank the fat content of the following
animals' milk (highest to lowest)
HOODED SEAL BLACK
RHINOCEROS
HUMAN

6. CORRECT ANSWER
hooded seal, human, black rhinoceros
Hooded seals have the fattiest milk (60%) while
black rhinoceroses have the skimmest (0.2%).

7. 3. What percent of people are lactose
intolerant?
20% 70% 60% 40%

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

9. 4. How much calcium does a teen our
age need?
1125
mg
1730
mg
1500
mg
1300
mg

10. CORRECT ANSWER
1300 mg is the daily
recommended value.

11. 5. What is special about the casu
marzu cheese?

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

13. ISOTOPES
OF
CALCIUM
ISOTOPES
OF
CALCIUM

14. CALCIUM
● has 24 isotopes
● 5 stable isotopes and 19 radioactive
isotopes exist ranging from 34Ca to
57Ca

15. 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

16. 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.

17. 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.

18. 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.

19. 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.

20. CALCIUM-44
● A stable isotope containing 24
neutrons
● Percentage abundance: about 2%
● Appears as a white powder
● Melting point of 800oC
● Insoluble in water

21. 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.

22. ISOTOPES OF
CALCIUM

23. 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.

24. 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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