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All gases are made up of elements, but some are not pure elements. Some are compounds, which are not the same as elements. For example, CO2 is a compound and a gas, but not an element.
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∙ 12y ago
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What substances cannot be broken down into any other substances by physical or chemical means?
All substances can be broken into any other substances (or elements) by chemical or physical methods.
How many different substances can be made with four elements?
It depends on the elements! If two of them are carbon and hydrogen, hundreds of compounds can be made from these elements alone. If the four elements are all noble gases, no new substances can be made from them by chemical reaction.
What are the simplest pure substances that can not be broken down into any other substance?
substances that cannot be broken down chemically into other substances are
What astronomer thought all substances were built from only 5 elements?
Aristotle!:)
What are compounds and elements called?
substances
The primary substances of which all other things are composed are elements or molecules?
The primary substances of which all other things are composed are known as elements.
Are all substances are elements?
Yes my friends. All elements are pure substances that cannot be broken down. However, pure substances aren't all elements.
All substances are built from?
elements elements
Are all the substances in the periodic table elements?
Yes! All of the 'substances' are elements. However elements can join together to make compounds.
What substances are element?
All of the substances found in the Periodic Table are considered as elements. None others are.
How were some of the elements alike and different?
They are all Elements and They are diiferent substances
What element has the lowest denisty of all of the elements?
Hydrogen is the least dense of all the elements and all other known substances.
Are most substances elements?
All substances are MADE FROM elements but they are not elements. For example CH4 is made of one carbon atom and four Hydrogen atoms. Carbon and Hydrogen are pure elements but CH4 is not an element.
Is gold a stubstance?
Gold id an element, symbol Au (see the periodic table.) All elements are substances but very few substances are elements.
What do all metals have in common when they react?
they have the elements and they are in the same substances
How do you know it is a chemical?
All substances which are not pure elements are chemicals.
Which element is not a pure element?
All elements are pure substances.
