What is the atomic number of carbon?
A) 5
B) 6
C) 7
D) 8
Answer: B) 6
Which element is the most abundant in Earth’s crust?
A) Oxygen
B) Silicon
C) Aluminum
D) Iron
Answer: A) Oxygen
What is the chemical symbol for gold?
A) Au
B) Ag
C) Fe
D) Cu
Answer: A) Au
Which gas makes up the majority of Earth’s atmosphere?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Answer: C) Nitrogen
What is the pH of a neutral solution?
A) 0
B) 7
C) 14
D) 5
Answer: B) 7
Which subatomic particle carries a negative charge?
A) Proton
B) Neutron
C) Electron
D) Positron
Answer: C) Electron
What is the chemical formula for water?
A) CO2
B) H2O
C) CH4
D) O2
Answer: B) H2O
Which law states that the total pressure of a gas mixture is the sum of the partial pressures of its individual gases?
A) Boyle’s Law
B) Charles’s Law
C) Dalton’s Law
D) Avogadro’s Law
Answer: C) Dalton’s Law
What is the process of converting a solid directly into vapor without passing through the liquid phase called?
A) Sublimation
B) Evaporation
C) Condensation
D) Melting
Answer: A) Sublimation
Which element is a noble gas and commonly used in lighting?
A) Helium
B) Neon
C) Argon
D) Krypton
Answer: C) Argon