A good note is to remember a chemical substance is a pure form of matter.
A chemical element is pure chemical substance consisting of once type of atom distinguished by it's atomic number (quantity of protons within an atom's nucleus.)Where as a chemical compound is a pure chemical substance consisting of two or more chemical element.
The chemical formula of zinc chloride is ZnCl2.
The official IUPAC name for this compound is tetrabromomethane, but more American chemists probably call it "carbon tetrabromide".
A chemical formula is a shorthand that uses symbols to represent the elements in a compound and show their ratios. For example, the chemical formula for water is H2O, indicating that it is made up of two hydrogen atoms for every one oxygen atom.
My teacher has engraved this saying into my head: chemical formulas are mole ratios. Each compound is composed of elements and each molecule of a compound is created by the same ratio of elements. For example MgCl2 (Magnesium chloride). For every MgCl2 molecule, one Mg+2 ion and two Cl-1 ions come together to form MgCl2. This means that for every mole of MgCl2, it will be made up of 1 mole of Mg and 2 moles of Cl. The subscripts on the elements are the number of moles of each element used to create the compound, so it would be correct to say that the chemical formula is a ratio of moles of each of the elements in the compound.
The chemical name for the compound with the formula Na2S is sodium sulfide. In this compound, sodium (Na) is in the +1 oxidation state, and sulfur (S) is in the -2 oxidation state. The subscript "2" in the formula indicates that there are two sodium atoms for every one sulfur atom in the compound.
Every chemical compound is unique and different from the ELEMENTS it contains
toothpaste
a combination of mixtures
Yes; this is part of the definition of a compound.
The chemical formula of zinc chloride is ZnCl2.
The chemical formula for this compound would be NI3, as there is one nitrogen atom for every three iodine atoms.
Compounds are made up of two or more elements.
This compound is the calcium iodide - CaI2.
yes, the chemicals form protein
The chemical formula for the compound containing one carbon atom for every four bromine atoms is CBr4, known as carbon tetrabromide.
A chemical can be defined as a substance with well defined properties. There are a number of different types of chemicals. Every element is a chemical. Every compound is also a chemical. And even a mixture of elements and/or compounds is also a chemical (it might also be described as a mixture of chemicals).
We have chemical symbols so that we can quickly write about an element or compound with out having to write out the name every time you want to refer to it.