Question

______20. What does a chemical formula tells about a compound?
I. The number of atoms.
II. Mass number.
III. Constituent elements that made up the compound.
IV. The kind of element.
B. I B. III and I C. III only D. I and IV

Answer 1

Answer:

A chemical formula identifies each constituent element by its chemical symbol and indicates the proportionate number of atoms of each element. In empirical formulae, these proportions begin with a key element and then assign numbers of atoms of the other elements in the compound, by ratios to the key element.