Calcium

Calcium Carbonate - CaCO3

This is found in rocks such as limestone and is the main component of seashells

Calcium Chloride - CaCl2

This is a salt which is found naturally in very small quantities

Calcium Hydroxide - Ca(OH)2

My understanding is that this does not occur naturally, it is very useful in many industries

Calcium Oxide - CaO

Created during the decomposition of limestone

To name a few.

Anytime of the day is OK.

Actually if you're working out. The best time to take vitamins or supplements is within an hour after your workout. The reason is because after a good workout and cardio session, your glycogen or body sugar is all but depleted and your muscles will act like a sponge and absorb and replenish the vitamins and amino acids burnt up during rigorous exercise. For sedentary people, anytime is fine.

Yes. Eggshells are composed of approximately 95% calcium carbonate (CaCO3). One average 5.0 gram egg shell shells out 2.0 grams of calcium.

Milk and and all dairy products(cheese, yogurt) are rich in calcium. If you do not enjoy consuming those foods than try taking calcium supplements. They have them in chewable "candies."

Cheese, milk, yogurt and other dairy products are rich in calcium. Sesame seeds, tofu, dried herbs, almonds, flax seeds, brazil nuts, herring fish and green leafy vegetables such as kale are also high in calcium.

Because Calcium helps you absorb Vitamin D. It also tastes good, so try for 2-4 servings a day, even though recommendation is only 2-3, so drink 3-5 a day, k?

Calcium is good for your bones teeth and you need calcium in you or your bones and teeth will start to disintegrate and u will be ugly and have no friends .

Ca(OH)2 + H2SO4 --> CaSO4 + 2H2O

Acid base neutralization reaction producing a salt and water.

CaO + H 2 SO 4 = CaSO 4 + H 2 O

My book says that calcium is paramagnetic but I cannot understand why since it doesn't have any unpaired electrons as paramagnetic materials need to have. I have the same question for magnesium too.

Calcium Chloride is bascially salt. It is very corrosive to steel.

CaCO3 + 2HCl -> CaCl2 + CO2 + H2O

Produces a salt, calcium chloride, carbon dioxide gas and water.

This might not be the best answer but, preparing a buffer solution allows one to keep the pH value the same when small amounts of acids or bases are added. Buffer solutions resist change in pH.

Source: My Chemistry teacher's PowerPoint

Calcium is present in period 4. its group no. is 2

Calcium loses its two valence electrons to become Ca 2+ ion.

soluble
Soluble in water.

no because copper is a less reactive metal

Yes very well it produces calcium chloride, carbon dioxide, and water.

The reaction is CaCO3 + 2HCl --> H2O + CO2 + CaCl2

This occurs because the carbonate ion pulls hydrogen ions away from the hydrochloric acid, forming carbonic acid which is unstable and spontaneously decomposes into water and carbon dioxide

it is a white free flowing powder derived from limestone

A small amount of flouride is supposed to reduce tooth decay, so it is added to some toothpastes. Too much flouride is known to be harmful, so toothpaste without flouride is also available.

Because it contains one more valence electron than the third-lowest atomic numbered noble gas, argon. The noble gases are at the ends of periods.

Can I answer with a question? How is calcium hydroxide formed? What is "lime water"

Calcium and Vitamin D are essential for having healthy, strong bones. It is important to have enough Calcium and Vitamin D in a person's diet. Calcium also helps a person's blood to clot.

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yes