They all have Carbon, Hydrogen and Oxygen in them. Proteins also have Nitrogen in them.
A chemical change always forms one or more products which can be elements, molecules, and/or compounds.
No, elements in a compound are not always present in the same proportions. The ratio of elements in a compound is determined by its chemical formula.
A binary compound always contains two different elements. This means it will have a chemical formula consisting of two elements in fixed proportions. Binary compounds typically involve a metal and a nonmetal.
It doesn't have one. Shale is a mixture and doesn't always have the same composition. Only elements have chemical symbols
A binary compound is formed from two different chemical elements.
Elements have the same chemical formula because they are made up of only one type of atom. For example, the chemical formula for gold is always Au, regardless of its form.
No chemical formulas ever change. If there are different elements in a compound, it ceases to remain the same compound, and becomes a new compound.The chemical formula for quartz is SiO2. That is, always was, and always will be the chemical formula for quartz.
When geologists say that a mineral always contains certain elements in definite proportions, they mean that the mineral always has a specific chemical composition. This composition is a key characteristic that helps identify and classify minerals. Minerals are composed of specific elements arranged in a precise crystal lattice structure.
a compound always has the same chemical formula
Compounds always contain elements in exact ratios, based on the chemical formula of the compound. This means that the elements are present in specific and consistent proportions in the compound.
A chemical compound always contains exactly the same proportion of elements by mass. ---------------------------------------------------------------------------------------------------- A law that states that a compound always contains the same elements in the same proportions. Source: e2020
For example very rare radioactive chemical elements.