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Which formula contains only two elements?
1)Bi(NO3)3
2)KOH
3)NaClO3
4)Al2S3

User Thinh Vu
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1 Answer

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elements are made of one type of atoms. Elements have characteristic symbols for their identification.
1) Bi(NO₃)₃ - this is made of 3 elements - Bismuth , Nitrogen and oxygen
2) KOH - made of 3 elements - potassium (K), oxygen and hydrogen
3) NaClO₃ - made of 3 elements - sodium (Na), chlorine and Oxygen
4) Al₂S₃ - made of 2 elements - Aluminium and sulphur
we are asked for the formula with 2 elements , correct answer is 4)
User Fedor Skrynnikov
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