Which element is so reactive that it explodes on contact with water?
Sodium
Gold
Helium
Iron
Which chemical is known as “laughing gas”?
Nitrogen dioxide
Nitrous oxide
Carbon monoxide
Sulfur dioxide
What is the only metal that is liquid at room temperature?
Mercury
Lead
Gallium
Cesium
Which chemical element was first discovered in a meteorite rather than on Earth?
Helium
Neon
Iridium
Argon
What household chemical is commonly used to clean clogged drains but can react violently with aluminum?
Vinegar
Baking soda
Hydrogen peroxide
Sulfuric acid
Which element gives fireworks their green color?
Strontium
Barium
Copper
Sodium
Which element was named after the planet Uranus?
Uranium
Plutonium
Neptunium
Thorium
What is the main gas produced when vinegar reacts with baking soda?
Oxygen
Carbon dioxide
Hydrogen
Nitrogen
What substance can flow uphill against gravity due to capillary action?
Mercury
Water
Oil
Alcohol
Which element is famous for turning flames bright red in fireworks?
Lithium
Calcium
Copper
Potassium
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