Hello Kinseyantonio!
Here is the answer to your question...
It is positively charged and includes most of the atom’s mass.
I hope this helps you and have a great day!! :)
Pure substances are either elements or compounds. Elements can NOT be separated into other types of matter (physically or chemically). Therefore, elements are pure substances. Ex: Hydrogen gas is a pure substance, as it is made up of only Hydrogen atoms or molecules.
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