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About 70% hydrogen, 28% helium, and the remainder is "trace" amounts of every other element.
We believe that the universe was originally mostly hydrogen, with a little helium and a trace of lithium. Over the course of about 10 billion years, generations of stars formed from the hydrogen, fused the hydrogen into helium, and then blew themselves apart in titanic supernova explosions that created, in the instant of the explosion, every element heavier than lithium.
Our solar system formed about 4.5 billion years ago, born from the hydrogen gas from space and the dust and debris from every star that lived and died before then.
What else can I help you with?
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.
Which oif the nine substances are made of two elements?
Water (H2O), carbon dioxide (CO2), and salt (NaCl) are examples of substances made of two elements.
What are compounds and elements called?
substances
Substances made of one kind of atom?
Elements
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.
Pure substances made from only one type of atom are?
This would be called an element, or a mono-atomic compound.
How are elements and compound different?
Elements are made up of only one thing. While a compound is made of two of more elements. Here is an example. H2O. Water is hydrogen and oxygen.
Are elements considered to be a substance?
Yes, chemical elements are substances.
What Cannot be Split into any simpler substances?
Elements are substances that cannot be split into simpler substances by chemical means. They are made up of only one type of atom.
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.
What are the simplest pure substances that can not be broken down into any other substance?
The simplest pure substances that cannot be broken down into any other substances are elements. Elements are made up of only one type of atom and cannot be separated into simpler substances by ordinary chemical reactions. Examples include hydrogen, oxygen, and carbon.
What substances are made up of just one kind of atom?
Elements
