Iron (Fe2) in the presence of oxygen (O2) creates rust (Fe2O3). The process of rusting would be an example of what?

Which of the following is a physical property of copper?

Use the following symbols Hydrogen (H) Helium (He) Oxygen (O) Carbon (C) Silicon (Si) Iron (Fe). Which of the following is a compound?

These elements are listed with their density: (Al) 2.7, (Cu) 8.9, (Au) 19.3, (Fe) 7.9, (Pb) 11.3, (Hg) 13.6. Which element below has particles that are packed the closest together?

Which of the following would be a chemical change?

Which of the following is an example of a physical change?

Which of the following would NOT be a physical change?

Which of the following would be an example of a HETEROGENEOUS MIXTURE?

Pick the chemical change out of the following.

Fire protectant suits that firefighters wear are not flammable, flammability is an example of which of the following?

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