How many atoms of each element in CaCO3?

Answer 1

There is one calcium, one carbon and three oxygens. It is important to realise where chemical symbols begin and end, and that the difference between upper and lower case letters is vital. As originally submitted, this question had a lower case 'o', which would have altered the meaning of the numbers.

1. A symbol is an upper case letter or an upper case letter and a lower case one
2. C is one atom of carbon, O is one atom of oxygen and Co is one atom of cobalt
3. A number in a formula multiplies the symbol before it and only that.
4. If there is no number it means just one
5. A number after a bracket multiplies the whole bracket

Thus in CaCO3 we see there are three types of atom, Ca C and O , and the 3 multiplies only the O.

If it had been CaCo3 we would have had one calcium and three cobalts. That combination doesn't actually exist, but that's what the symbols would read.

Answer 2

The chemical formula for calcium carbonate is CaCO3. The elements present are calcium (Ca), carbon (C) and oxygen (O). So there are 3 different elements present. But if you want the total number of elements, it would be 1 Ca + 1 C + 3 O = 5 total.

Answer 3

In one molecule of CaCO3 (calcium carbonate), there is 1 atom of calcium (Ca), 1 atom of carbon (C), and 3 atoms of oxygen (O).

Answer 4

There is:

1x Calcium

1x Carbon

3x Oxygen

So 3 different elements, or 5 altogether.

Answer 5

CaCO3 is contains 3 elements, they are:

Calcium (Ca) - 1 atom

Carbon (C) - 1 atom

Oxygen (O) - 3 atoms

Answer 6

5

Answer 7

three...

Answer 8

2