question The Lewis structure for a nitrogen trifluoride NF3 molecule shows

Chemistry

The Lewis structure for a nitrogen trifluoride (NF3) molecule shows:

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

Nitrogen trifluoride (NF3) is represented by three single covalent bonds in its Lewis structure.

What is the function of RNA interference (RNAi) in cells?

A. Regulating gene expression
B. Catalyzing chemical reactions
C. Storing genetic information
D. Facilitating cellular respiration

The reaction 2H₂ + Cl₂ → 2HCl is an example of a:

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

Which technique measures the absorption of X-rays by atoms to determine the elemental composition of a sample?

A. X-ray fluorescence (XRF)
B. X-ray diffraction (XRD)
C. X-ray photoelectron spectroscopy (XPS)
D. X-ray absorption spectroscopy

What is the shape of a molecule with a trigonal pyramidal electron domain geometry?

A. Trigonal pyramidal
B. Linear
C. Tetrahedral
D. Bent

The chemical equation 2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O represents a:

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

What is the term for a bond formed by the transfer of electrons from one atom to another?

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

The atomic number of an element represents the number of:

A. Protons
B. Neutrons
C. Electrons
D. Nucleons

Which sublevel is associated with the principal quantum number n = 3?

A. s
B. p
C. d
D. f

Which element has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹ 4p²?

A. Silicon
B. Phosphorus
C. Sulfur
D. Chlorine

What is the term for a bond formed by the attraction between two atoms with identical electronegativities?

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