compounds CAN be decomposed elements CANT
The answer would be Mercury because it is an element and can't be broken down by chemical means. but methane, ethanol and ammonia can be broken down by physical means because they are compounds.
An element cannot be broken down into simpler substances by ordinary chemical methods as it conatins only atoms of the same substance.
Element
An element.
Element
This is the atom of a chemical element, unbreakable by chemical methods.
All substances can be broken into any other substances (or elements) by chemical or physical methods.
For a chemical change they analyze the new substances to prove there has been a change in the chemical composition. I am not sure about physical though.
a mixture
Help me please I need a answer and fast
This is the atom of a chemical element, unbreakable by chemical methods.
The atom cannot be broken by chemical methods.
An element is a substance that cannot be broken into simpler substances by chemical methods, such as Neon or Oxygen.The Periodic Table contain all known chemical elements.
This is the atom of a chemical element (of course by chemical methods).
An element is a pure substance that cannot be separated into simpler substances by physical or chemical means. Atoms are the smallest particles in which an element can be divided and still retain its properties.
Elements are substances that cannot be broken down into any simpler substances. Hence they cannot be broken down by chemical methods. They may change in appearance if physical methods, but chemically, they still remain as the element.
All substances can be broken into any other substances (or elements) by chemical or physical methods.
in chemistry, chemical substance is a form of matters that has constant chemical composition and characteristic properties.it cannot be separated into components by physical separation methods. mixtures are the product of mechanical blending or mixing of chemical substance like elements and compounds ,without chemical bonding or other chemical change.
For a chemical change they analyze the new substances to prove there has been a change in the chemical composition. I am not sure about physical though.
a mixture
In biology (concerning macromolecules), a polymer can be broken down into simpler substances called monomers. However, the general answerwould be a"chemical compound".
Help me please I need a answer and fast