Calcium fluoride.
CaF2
Calcium difluoride, CaF2 Dialuminium trisulphide, Al2S3
Calcium fluoride is CaF2, and aluminium sulfide is Al2S3. All numbers should be subscripts.
The calcium atom will transfer its two valence electrons, one to each of two iodine atoms, to form the compound calcium iodide, CaI2.
Calcium carbonate, CaCO3, has one calcium atom, one carbon atom, and three oxygen atoms, which adds up to five atoms.
CaF2
Calcium difluoride, CaF2 Dialuminium trisulphide, Al2S3
yes
Calcium fluoride is CaF2, and aluminium sulfide is Al2S3. All numbers should be subscripts.
PClF2 is made up of two fluorine atoms one chlorine atom and one phosphorus atom.
Ca+2 F-1 <----- these are the ions and their charges Ca+2 F-1 F-1 <----- the charges have to add up to zero, so two -1 fluorine ions cancel out one +2 calcium ions CaF2 <---- simplify
The compound you describe is fluro methane. It has a single carbon atom at the centre (the "C") which is attached to 3 hydrogen atoms (the "H") and one fluorine atom (the "F"). It is a molecule with a tetrahedral shape. The compound is known as a fluoro carbon.
Hydrogen and fluorine. One of each atom in the compound.
This compound is the calcium iodide - CaI2.
Compound. Elements only have one kind of atom. Calcium carbonate has 3- calcium, carbon and oxygen. CaCO3
The calcium atom will transfer its two valence electrons, one to each of two iodine atoms, to form the compound calcium iodide, CaI2.
Ca is calcium, one atom.