Diamond. Diamond is composed strictly of carbon, covalently bonded to one another creating a covalent network, making it the hardest substance in the world. Also, graphite of your pencil is composed strictly of carbon, except that the structure is different than diamond.
No. A pure substance is one that cannot be simplified by physical means. A substance that cannot be broken down chemically to simpler substances is an element.
A substance that cannot be broken down is a pure substance
Element (It IS possible to alter elements by bombarding them with sub atomic particles and attempting to either augment or spilt the nucleus. Some elements are self-altering. These are the radioactive isotopes and they can change to several different elements before reaching their end state.)
Element, noun ;;One of a class of substances under the periodic table that cannot be separated into simpler substances by chemical means (or chemical reactions.)
A pure substance that cannot be chemically broken down into simpler substances.
!!A pure substance that cannot be separated or broken down into simpler substances by ordinary chemical means!!
element
An element cannot be separated into simpler substances by chemical means.
element
element
A substance that cannot be broken down is a pure substance
There are two types of substances: elements and compunds. Elements cannot be separated into simpler substances while compunds can. Take for example iron, pure iron is made of iron atoms, and they can't be divided into simpler substances, as such, iron is an element. On the other hand, salt is a substance that CAN be separated into sodium and chloride, so salt is a compound (and since sodium and chloride can't be furtherly separated they are elements). So, an element IS a substance, but not all substances are elements.
that they are substances that cannot be separated
Any substance or compound cannot be physically separated. The broad term for this is simply "substance".
Not: atoms The answer is an element
Elements
What are the components of solutions?
Is a pure substance such as an element. Remember elements can not be broken down further by chemical or physical processes.