question Which law states that the chemical properties of elements are a periodic function of their atomic numbers

Chemistry

Which law states that the chemical properties of elements are a periodic function of their atomic numbers?

A. Modern periodic law
B. Mendeleev's law
C. Avogadro's law
D. Boyle's law

The modern periodic law describes the periodicity of elements based on atomic numbers.

What is the product of the reaction between acetic acid (CH₃COOH) and sodium bicarbonate (NaHCO₃)?

A. Sodium acetate and water
B. Carbon dioxide and water
C. Sodium acetate and carbon dioxide
D. Sodium hydroxide and carbon dioxide

The balanced chemical equation for the reaction between hydrochloric acid (HCl) and sodium carbonate (Na₂CO₃) is:

A. 2HCl + Na₂CO₃ → 2NaCl + H₂O + CO₂
B. HCl + Na₂CO₃ → NaCl + H₂O + CO₂
C. 2HCl + Na₂CO₃ → NaCl + H₂O + CO₂
D. HCl + Na₂CO₃ → 2NaCl + H₂O + CO₂

What is the product of the reaction between hydrochloric acid (HCl) and magnesium carbonate (MgCO₃)?

A. Magnesium chloride and water
B. Carbon dioxide and water
C. Magnesium chloride and carbon dioxide
D. Magnesium hydroxide and carbon dioxide

What is the formula for calculating heat (q) in a reaction?

A. q = mcΔT
B. q = nCΔT
C. q = ΔH
D. q = ΔS

The standard molar entropy (S°) for a substance is measured in units of:

A. J/(mol·K)
B. J/mol
C. J/L
D. J/K

Which of the following is an example of a tertiary alcohol?

A. CH₃OH
B. CH₃CH₂OH
C. (CH₃)₃COH
D. CH₃COOH

The concept that energy levels of electrons in an atom are quantized is explained by:

A. Bohr's model
B. Schrödinger equation
C. Pauli exclusion principle
D. Hund's rule

The bond in a methane (CH4) molecule is:

A. Covalent
B. Ionic
C. Metallic
D. Polar

Who discovered the neutron?

A. James Chadwick
B. Ernest Rutherford
C. Marie Curie
D. J.J. Thomson

Which law of thermodynamics states that as a system approaches absolute zero, the entropy approaches a minimum constant value?

A. Zeroth Law
B. First Law
C. Second Law
D. Third Law