elements & compounds

Which of the following is not a compound?

• HCl
• Cl
• NaCl
• CO2

Which of the following represents an element?

• H₂O
• H₂
• NaCl
• CaCO₃

Which of the following could be a symbol on he periodic table of elements?

• JZ
• jz
• Jz
• JZa

Salt water boils and the water completely evaporates, salt (NaCl) is left in the bottom of the beaker. Which of the following is left in the beaker?

• Compound
• Element
• Mixture
• None of the Above

What cannot be broken down into other substances?

• Compound
• Mixture
• Solids
• Element

What is made up two or more elements that are chemically combined?

• Element
• Mixture
• Compound
• Solids

Which of the following an element?

• Carbonic Acid
• Copper
• Iron and Copper
• Water

How many elements are represented in the compound?
Na₂CO₃

• 1
• 2
• 3
• 4

Is sugar (C₁₂H₂₂O₁₁) an element or a compound?

• Element
• Compound

Is water an element or a compound?

• Element
• Compound