Post on 22-Jan-2018
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%).
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.
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&
oq=calcium+content+of+TOFU&gs_l=serp.3..0j0i22i30k1.18025.18
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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