Fluorine is the most electronegative element in the periodic table.

Rubidium (Rb) is the most electropositive element among the given options.

Potassium (K) is more reactive than Sodium (Na) and Lithium (Li) due to its larger atomic size and lower ionization energy.

Lead commonly exhibits a +4 oxidation state, although +2 is also stable, +4 is more stable in many compounds.

The most stable oxidation state of nitrogen is +5, as seen in compounds like nitric acid.

In this reaction, MnO4⁻ is reduced to Mn²⁺, thus it acts as the oxidizing agent.

The biceps brachii is the primary muscle responsible for flexing the elbow joint.

The deltoid muscle is the primary muscle responsible for the abduction of the arm at the shoulder joint.

Ethylene (C2H4) is the simplest alkene, containing a double bond between two carbon atoms.

Methanoic acid (HCOOH) is the simplest carboxylic acid, containing only one carbon atom.

Dimethyl ether (CH3-O-CH3) is the simplest ether, consisting of two methyl groups bonded to an oxygen atom.

Brittle materials fracture without significant plastic deformation.

Exothermic reactions release heat to the surroundings, resulting in a negative change in enthalpy (ΔH < 0).

The adsorption of gases on solids is typically an exothermic process, as energy is released when the gas molecules adhere to the surface.

Modern classification is based on evolutionary relationships, including genetic information.

Shear modulus (G) measures the material's response to shear stress, indicating how it deforms under such stress.

Vanillin is the primary component of the extract of the vanilla bean and is widely used as a flavoring agent in food.

Doping is the process used to create a p-n junction by adding impurities to a semiconductor.

Uranium-238 is commonly used as fuel in nuclear reactors due to its ability to undergo fission.

The kingdom Plantae includes multicellular organisms that are autotrophic.

The kingdom Plantae includes organisms that are primarily autotrophic, meaning they produce their own food through photosynthesis.

The kingdom Protista includes organisms that can be both autotrophic and heterotrophic.

The kingdom Protista includes both unicellular and multicellular organisms.

The kingdom Protista includes unicellular organisms.

The organism level of organization is the highest, as it encompasses all systems and structures functioning together as a single living entity.

Steel has the highest tensile strength among the given materials.

Copper has the highest thermal conductivity among the given materials.

Silicon is a common intrinsic semiconductor used in electronic devices.

Copper is a good conductor of electricity due to its high number of free electrons.

Glass is commonly used as a dielectric material in capacitors due to its high dielectric constant and insulating properties.