NCl3
PCl3
CaCl2
nitrogen triiodide
Nitrogen dioxide, which has the formula NO2.
One zinc atom = Zn Two chlorine atoms = Cl2 Chemical formula for zinc choride compound = ZnCl2
Depends on the number of formula units. In one formula unit there are 4 atoms.
The chemical formula of zinc chloride is ZnCl2.
The formula for Zinc Chloride is ZnCl2. That means that for every 1 atom of Zinc there are 2 atoms of chlorine.
The chemical formula N2O is for the nitrous oxide (nitrogen(I) oxide).
If you know your Classics (Latin), the name gives the clue . 'Tetra' means four(4). So carbon tetrachloride is has four chlorine atoms. Its modern IUPAC name is 'Tetrachlormethane'. It has the formula 'CCl4'.
In magnesium chloride, MgCl2, there are two chlorine atoms for every magnesium atom as chlorine is found as a compound.
The formula for ammonia is NH3. That means that for every nitrogen atom, there are 3 atoms of hydrogen.