science quiz

The chemical symbol of iron is

• Na

• Fe

• Ir

• Au

Which of the following is noble gas

• Oxygen

• Argon

• Carbon

• Iron

Which element is essential for organic molecule

• Hydrogen

• Carbon

• Oxygen

• Chlorine

A solution with a phf 7 is called

• Acid

• Base

• Neutral

• All of the above

Which planet is known as the red planet

• Mars

• Jupiter

• Mercury

• Venus

Which type of energy is stored in the bonds of molecules

• Kinetic energy

• Potential energy

• Thermal energy

• Electrical energy

Which gas makes up the majority of the Earth's atmosphere?

• Oxygen

• Nitrogen

• Carbon

• Methane

What is the process of a substance changing from a solid to a gas without passing through the liquid phase called?

• Evaporation

• Sublimation

• Vaporization

• Condensation

What is the formula for baking powder

• CaO

• NaHCo3

• CaCo3

• Na2Co3

What is the atomic number of carbon?

• 12

• 6

• 19

• 16