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An element is a pure substance that is made of only one kind of atom. The symbol for a element is always one or two letters. When the symbol contains two letters, the 1st letter is always capitalized and the 2nd letter is always lower case. A compound is a pure substance containing two or more...

An element is a pure substance that is made of only one kind of atom. The symbol for a element is always one or two letters. When the symbol contains two letters, the 1st letter is always capitalized and the 2nd letter is always lower case. A compound is a pure substance containing two or more...

An element is a pure substance that is made of only one kind of atom. The symbol for a element is always one or two letters. When the symbol contains two letters, the 1st letter is always capitalized and the 2nd letter is always lower case. A compound is a pure substance containing two or more...