Common-Core/ Grade 7
Science MCQ Based On Classifying elementary substances and compounds using chemical formulas
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Common-Core Grade 7 - 7 Classifying elementary substances and compounds using chemical formulas
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HI is a strong acid, one that is ionized completely in an aqueous solution.
A compound is the combination of two or more elements.
Elements combine to form chemical compounds.
Four parts hydrogen, one part carbon and one part oxygen makes this compound.
Elements combine to form chemical compounds.
One atom of carbon= C One molecue of oxygen = O2
Elements can not be broken into parts. Elements are in fixed numbers but compounds are endless.
Substances that are composed of only one chemical element.
Mercury is an element. It is also known as quicksilver and was formerly named hydrargyrum from the Greek word.
Elements can not be decomposed into any other elements.
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