Elements and Compounds 6th

How many different elements are in this chemical formula: C₂H₂ClK₃

• 6
• 8
• 2
• 4

 Which of the following atomic symbols is written correctly? 

• OH
• oH
• fe
• H

Which of the following is a pure substance?

• O₂
• Al₂CO₅
• C₆H₁₂O₆
• SiO₂

Which of the following chemical formulas represents a compound? 

• C₃
• O₂
• CH₃CHO
• H₂

Can be found on the periodic table

• Element
• Compound
• MIxture

What is krypton?

• element
• compound
• mixture

What is gold?

• element
• compound
• mixture

What is sugar?

• element
• compound
• mixture

What is water?

• element
• compound
• mixture

When two or more elements chemically combine

• element
• compound
• mixture
• solution