Video Transcript
Fill in the blank. Blank is a pure substance
consisting of one type of atom that cannot be broken down chemically into a simpler
substance.
The atom is the smallest unit of
ordinary matter that forms a chemical element. Chemical elements, or just
elements, are substances that consist of one type of atom. There is matter more complicated
than chemical elements, such as compounds. A compound is a substance that
contains the atoms of two or more different elements.
Another form of matter containing
two or more different elements is an alloy. An alloy is a metallic solid
solution containing at least two different types of elements.
A molecule, another form of matter,
is a substance composed of two or more atoms bonded together. These atoms may be the same or
different.
Another key form of matter is the
mixture. A mixture is a physical combination
of two or more different substances. This means that the substances are
not bonded together and can be separated from one another. This is different to what is
specified in the question, as the substance in the question cannot be broken down
chemically into a simpler substance. It is easy to separate a mixture,
which indicates that mixture is not the answer.
Additionally, the type of substance
should consist of one type of atom. So it seems as though a chemical
element, which is also known as an element, is the best fit for this question. Therefore, an element is a pure
substance consisting of one type of atom that cannot be broken down chemically into
a simpler substance. The correct answer is an
element.
