question The concept of the noble gas configuration refers to an atom s similarity to the

Chemistry

The concept of the "noble gas configuration" refers to an atom's similarity to the:

A. Nearest noble gas
B. Noble gas one period down
C. Noble gas two periods down
D. Noble gas one group over

Noble gas configuration resembles the nearest noble gas.

What is the equation for the Gibbs free energy (G) in a reaction?

A. ΔG = ΔH - TΔS
B. ΔG = ΔH + TΔS
C. ΔG = ΔH/T
D. ΔG = -ΔH/T

The compound CaCO₃ is commonly known as:

A. Calcium carbonate
B. Calcium chloride
C. Calcium nitrate
D. Calcium sulfate

The bond angle in a water (H2O) molecule is approximately:

A. 104.5°
B. 120°
C. 180°
D. 90°

The chemical equation 2H₂ + O₂ → 2H₂O represents a:

A. Synthesis
B. Decomposition
C. Redox
D. Combustion

What is the product of the reaction between nitric acid (HNO₃) and calcium carbonate (CaCO₃)?

A. Calcium nitrate and carbon dioxide
B. Nitrogen gas and water
C. Calcium nitrate and water
D. Carbon dioxide and calcium hydroxide

Who discovered the neutron?

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

What is the term for a bond formed by the sharing of electrons with no difference in electronegativity?

A. Nonpolar covalent
B. Polar covalent
C. Ionic
D. Metallic

What does the term "pH" measure in a solution?

A. Acidity or alkalinity
B. Concentration of ions
C. Temperature
D. Pressure

What type of reaction occurs when two compounds exchange positive ions to form new compounds?

A. Double displacement
B. Single displacement
C. Synthesis
D. Decomposition

The Lewis structure for a carbon dioxide (CO2) molecule shows:

A. Two single bonds
B. One double bond
C. One triple bond
D. Three single bonds