Which of the following statements about elements and compounds is accurate?

• Elements are made up of just one type of atom, but compounds are made up of many different types of atoms.

• Elements and compounds are pure substances that can be broken down physically.

• Elements are not found on the Periodic Table, but compounds are found on the Periodic Table.

• Elements are pure substances that can be broken down chemically, but compounds are pure substances that cannot be broken down chemically.

Which of the following would contain only atoms of the same element?

• CO₂

• NaOH

• HCl

• 2O₃

Tags

NGSS.MS-PS1-1

Which of the following is an example of a molecule?

• Fe

• N₂

• Mg

• O

Tags

NGSS.MS-PS1-1

Which of the following could be the chemical formula for a compound?

• O₂

• CO₂

• H₂ + O₂

• Au

Tags

NGSS.MS-PS1-1

Which of the following could be the chemical formula for an element?

• Si₂

• H₂O

• C + O₂

• C₆H₁₂O₆

Tags

NGSS.MS-PS1-1

Which of the following could be a chemical symbol for an element?

• Ne

• CO₂

• H₂

• NaCl + H₂O

Which of the following is not an example of a compound?

• Hydrogen peroxide (H₂O₂)

• Salt (NaCl)

• Carbon (C)

• Iron Oxide (Fe₂O₃)

Tags

NGSS.MS-PS1-1

Which of the following is not an example of an element’s symbol?

• Sulfur (S)

• Manganese (Mn)

• Copper (Cu)

• Iron Oxide (Fe₂O₃)

Which of the following is not an example of an element?

• 2H₂

• Zn

• C₆H₁₂O₆

• O₂

How are elements and compounds similar?

• Elements and compounds both consist of just one type of atom.

• Elements and compounds are both pure substances.

• Elements and compounds are both located on the Periodic Table.

• Elements and compounds are both able to be broken down chemically.